ci: change to main branch

Signed-off-by: Frederic Pillon <frederic.pillon@st.com>

Author: fpistm

.github/workflows/Continuous-Integration.yml

@@ -2,7 +2,7 @@ name: STM32 Core Continuous Integration
 on:
   push:
     branches:
-      - master
+      - main
     paths-ignore:
       - '*.json'
       - '**.md'
@@ -31,11 +31,11 @@ jobs:
     steps:
     # First of all, clone the repo using the checkout action.
     - name: Checkout
-      uses: actions/checkout@master
+      uses: actions/checkout@main
 
     - name: Astyle check
       id: Astyle
-      uses: stm32duino/actions/astyle-check@master
+      uses: stm32duino/actions/astyle-check@main
       with:
         astyle-definition: 'CI/astyle/.astylerc'
         ignore-path-list: 'CI/astyle/.astyleignore'
@@ -52,11 +52,11 @@ jobs:
     steps:
     # First of all, clone the repo using the checkout action.
     - name: Checkout
-      uses: actions/checkout@master
+      uses: actions/checkout@main
 
     - name: Compilation
       id: Compile
-      uses: stm32duino/actions/compile-examples@master
+      uses: stm32duino/actions/compile-examples@main
       with:
         additional-url: 'https://github.com/stm32duino/BoardManagerFiles/raw/dev/package_stmicroelectronics_index.json'
 
@@ -72,7 +72,7 @@ jobs:
     steps:
       # First of all, clone the repo using the checkout action.
     - name: Checkout
-      uses: actions/checkout@master
+      uses: actions/checkout@main
 
     - name: PlatformIO
       id: Compile