Update indexstore-db branch to main

Author: shahmishal

utils/update_checkout/update-checkout-config.json

@@ -76,7 +76,7 @@
                 "icu": "release-65-1",
                 "yams": "3.0.1",
                 "cmake": "v3.16.5",
-                "indexstore-db": "master",
+                "indexstore-db": "main",
                 "sourcekit-lsp": "master",
                 "swift-format": "master"
             }
@@ -106,7 +106,7 @@
                 "icu": "release-65-1",
                 "yams": "3.0.1",
                 "cmake": "v3.16.5",
-                "indexstore-db": "master",
+                "indexstore-db": "main",
                 "sourcekit-lsp": "master",
                 "swift-format": "master"
             }
@@ -126,7 +126,7 @@
                 "swift-integration-tests": "swift-3.0-branch",
                 "swift-xcode-playground-support": "swift-3.0-branch",
                 "ninja": "release",
-                "indexstore-db": "master",
+                "indexstore-db": "main",
                 "sourcekit-lsp": "master",
                 "swift-format": "master"
             }
@@ -147,7 +147,7 @@
                 "swift-integration-tests": "swift-3.1-branch",
                 "swift-xcode-playground-support": "swift-3.1-branch",
                 "ninja": "release",
-                "indexstore-db": "master",
+                "indexstore-db": "main",
                 "sourcekit-lsp": "master",
                 "swift-format": "master"
             }
@@ -168,7 +168,7 @@
                 "swift-integration-tests": "swift-4.0-branch",
                 "swift-xcode-playground-support": "swift-4.0-branch",
                 "ninja": "release",
-                "indexstore-db": "master",
+                "indexstore-db": "main",
                 "sourcekit-lsp": "master",
                 "swift-format": "master"
             }
@@ -189,7 +189,7 @@
                 "swift-integration-tests": "swift-4.1-branch",
                 "swift-xcode-playground-support": "swift-4.1-branch",
                 "ninja": "release",
-                "indexstore-db": "master",
+                "indexstore-db": "main",
                 "sourcekit-lsp": "master",
                 "swift-format": "master"
             }
@@ -210,7 +210,7 @@
                 "swift-integration-tests": "swift-4.2-branch",
                 "swift-xcode-playground-support": "swift-4.2-branch",
                 "ninja": "release",
-                "indexstore-db": "master",
+                "indexstore-db": "main",
                 "sourcekit-lsp": "master",
                 "swift-format": "master"
             }
@@ -232,7 +232,7 @@
                 "swift-xcode-playground-support": "swift-5.0-branch",
                 "ninja": "release",
                 "icu": "release-61-1",
-                "indexstore-db": "master",
+                "indexstore-db": "main",
                 "sourcekit-lsp": "master",
                 "swift-format": "master"
             }
@@ -329,7 +329,7 @@
                 "icu": "release-65-1",
                 "yams": "3.0.1",
                 "cmake": "v3.16.5",
-                "indexstore-db": "master",
+                "indexstore-db": "main",
                 "sourcekit-lsp": "master",
                 "swift-format": "master"
             }