"master" was renamed "main".

Test: N/A
Change-Id: I86d5578eaac260e55a9583db7ab49812b4ba1f5d
diff --git a/cc/library.go b/cc/library.go
index 592f70f..ebfec35 100644
--- a/cc/library.go
+++ b/cc/library.go
@@ -1419,7 +1419,7 @@
 func (library *libraryDecorator) crossVersionAbiDiff(ctx android.ModuleContext, referenceDump android.Path,
 	baseName string, isLlndkOrNdk bool, sourceVersion, prevVersion string) {
 
-	errorMessage := "error: Please follow https://android.googlesource.com/platform/development/+/master/vndk/tools/header-checker/README.md#configure-cross_version-abi-check to resolve the ABI difference between your source code and version " + prevVersion + "."
+	errorMessage := "error: Please follow https://android.googlesource.com/platform/development/+/main/vndk/tools/header-checker/README.md#configure-cross_version-abi-check to resolve the ABI difference between your source code and version " + prevVersion + "."
 
 	library.sourceAbiDiff(ctx, referenceDump, baseName, prevVersion,
 		isLlndkOrNdk, true /* allowExtensions */, sourceVersion, errorMessage)