"master" was renamed "main".

Test: N/A
Change-Id: I86d5578eaac260e55a9583db7ab49812b4ba1f5d
diff --git a/android/module.go b/android/module.go
index 1a428e5..d8f004c 100644
--- a/android/module.go
+++ b/android/module.go
@@ -326,7 +326,7 @@
 	// defaults module, use the `defaults_visibility` property on the defaults module;
 	// not to be confused with the `default_visibility` property on the package module.
 	//
-	// See https://android.googlesource.com/platform/build/soong/+/master/README.md#visibility for
+	// See https://android.googlesource.com/platform/build/soong/+/main/README.md#visibility for
 	// more details.
 	Visibility []string