Merge pull request #39278 from apple/maxd/community-ci-main

README: link to the `main` branch of Community CI

Author: shahmishal

README.md

@@ -17,15 +17,13 @@
 
 | **OS** | **Architecture** | **Build** |
 |---|:---:|:---:|
-|**[Ubuntu 16.04 ](https://github.com/apple/swift-community-hosted-continuous-integration/blob/master/nodes/ppc64le_ubuntu_16_04.json)** | PPC64LE |[![Build Status](https://ci-external.swift.org/job/oss-swift-5.1-RA-linux-ubuntu-16.04-ppc64le/lastCompletedBuild/badge/icon)](https://ci-external.swift.org/job/oss-swift-5.1-RA-linux-ubuntu-16.04-ppc64le)|
-|**[Ubuntu 18.04](https://github.com/apple/swift-community-hosted-continuous-integration/blob/master/nodes/aarch64_ubuntu_18.04_docker.json)** | AArch64 |[![Build Status](https://ci-external.swift.org/job/oss-swift-RA-ubuntu-18.04-aarch64/lastCompletedBuild/badge/icon)](https://ci-external.swift.org/job/oss-swift-RA-ubuntu-18.04-aarch64)|
-|**[Ubuntu 20.04](https://github.com/apple/swift-community-hosted-continuous-integration/blob/master/nodes/aarch64_ubuntu_20.04_docker.json)** | AArch64 |[![Build Status](https://ci-external.swift.org/job/oss-swift-RA-ubuntu-20.04-aarch64/lastCompletedBuild/badge/icon)](https://ci-external.swift.org/job/oss-swift-RA-ubuntu-20.04-aarch64)|
-|**[CentOS 8 ](https://github.com/apple/swift-community-hosted-continuous-integration/blob/master/nodes/aarch64_centos_8_docker.json)** | AArch64 |[![Build Status](https://ci-external.swift.org/job/oss-swift-RA-centos8-aarch64/lastCompletedBuild/badge/icon)](https://ci-external.swift.org/job/oss-swift-RA-centos8-aarch64)|
-|**[Amazon Linux 2](https://github.com/apple/swift-community-hosted-continuous-integration/blob/master/nodes/aarch64_amazon_linux_2_docker.json)** | AArch64 |[![Build Status](https://ci-external.swift.org/job/oss-swift-RA-amazon-linux-2-aarch64/lastCompletedBuild/badge/icon)](https://ci-external.swift.org/job/oss-swift-RA-amazon-linux-2-aarch64)|
-|**[Android](https://github.com/apple/swift-community-hosted-continuous-integration/blob/master/nodes/x86_64_ubuntu_16_04_LTS_android.json)** | ARMv7 |[![Build Status](https://ci-external.swift.org/job/oss-swift-RA-linux-ubuntu-16.04-android/lastCompletedBuild/badge/icon)](https://ci-external.swift.org/job/oss-swift-RA-linux-ubuntu-16.04-android)|
-|**[Android](https://github.com/apple/swift-community-hosted-continuous-integration/blob/master/nodes/x86_64_ubuntu_16_04_LTS_android.json)** | AArch64 |[![Build Status](https://ci-external.swift.org/job/oss-swift-RA-linux-ubuntu-16.04-android-arm64/lastCompletedBuild/badge/icon)](https://ci-external.swift.org/job/oss-swift-RA-linux-ubuntu-16.04-android-arm64)|
-|**[Windows 2019 (VS 2017)](https://github.com/apple/swift-community-hosted-continuous-integration/blob/master/nodes/x86_64_windows_2019.json)** | x86_64 | [![Build Status](https://ci-external.swift.org/job/oss-swift-windows-x86_64/lastCompletedBuild/badge/icon)](https://ci-external.swift.org/job/oss-swift-windows-x86_64)|
-|**[Windows 2019 (VS 2019)](https://github.com/apple/swift-community-hosted-continuous-integration/blob/master/nodes/x86_64_windows_2019_VS2019.json)** | x86_64 | [![Build Status](https://ci-external.swift.org/job/oss-swift-windows-x86_64-vs2019/lastCompletedBuild/badge/icon)](https://ci-external.swift.org/job/oss-swift-windows-x86_64-vs2019)|
+|**[Ubuntu 16.04 ](https://github.com/apple/swift-community-hosted-continuous-integration/blob/main/nodes/ppc64le_ubuntu_16_04.json)** | PPC64LE |[![Build Status](https://ci-external.swift.org/job/oss-swift-5.1-RA-linux-ubuntu-16.04-ppc64le/lastCompletedBuild/badge/icon)](https://ci-external.swift.org/job/oss-swift-5.1-RA-linux-ubuntu-16.04-ppc64le)|
+|**[Ubuntu 18.04](https://github.com/apple/swift-community-hosted-continuous-integration/blob/main/nodes/aarch64_ubuntu_18.04_docker.json)** | AArch64 |[![Build Status](https://ci-external.swift.org/job/oss-swift-RA-ubuntu-18.04-aarch64/lastCompletedBuild/badge/icon)](https://ci-external.swift.org/job/oss-swift-RA-ubuntu-18.04-aarch64)|
+|**[Ubuntu 20.04](https://github.com/apple/swift-community-hosted-continuous-integration/blob/main/nodes/aarch64_ubuntu_20.04_docker.json)** | AArch64 |[![Build Status](https://ci-external.swift.org/job/oss-swift-RA-ubuntu-20.04-aarch64/lastCompletedBuild/badge/icon)](https://ci-external.swift.org/job/oss-swift-RA-ubuntu-20.04-aarch64)|
+|**[Android](https://github.com/apple/swift-community-hosted-continuous-integration/blob/main/nodes/x86_64_ubuntu_16_04_LTS_android.json)** | ARMv7 |[![Build Status](https://ci-external.swift.org/job/oss-swift-RA-linux-ubuntu-16.04-android/lastCompletedBuild/badge/icon)](https://ci-external.swift.org/job/oss-swift-RA-linux-ubuntu-16.04-android)|
+|**[Android](https://github.com/apple/swift-community-hosted-continuous-integration/blob/main/nodes/x86_64_ubuntu_16_04_LTS_android.json)** | AArch64 |[![Build Status](https://ci-external.swift.org/job/oss-swift-RA-linux-ubuntu-16.04-android-arm64/lastCompletedBuild/badge/icon)](https://ci-external.swift.org/job/oss-swift-RA-linux-ubuntu-16.04-android-arm64)|
+|**[Windows 2019 (VS 2017)](https://github.com/apple/swift-community-hosted-continuous-integration/blob/main/nodes/x86_64_windows_2019.json)** | x86_64 | [![Build Status](https://ci-external.swift.org/job/oss-swift-windows-x86_64/lastCompletedBuild/badge/icon)](https://ci-external.swift.org/job/oss-swift-windows-x86_64)|
+|**[Windows 2019 (VS 2019)](https://github.com/apple/swift-community-hosted-continuous-integration/blob/main/nodes/x86_64_windows_2019_VS2019.json)** | x86_64 | [![Build Status](https://ci-external.swift.org/job/oss-swift-windows-x86_64-vs2019/lastCompletedBuild/badge/icon)](https://ci-external.swift.org/job/oss-swift-windows-x86_64-vs2019)|
 
 ## Welcome to Swift