"master" was renamed "main".

Test: N/A
Change-Id: I86d5578eaac260e55a9583db7ab49812b4ba1f5d
diff --git a/cc/kernel_headers.go b/cc/kernel_headers.go
index 9ea988a..4f685be 100644
--- a/cc/kernel_headers.go
+++ b/cc/kernel_headers.go
@@ -34,7 +34,7 @@
 // kernel_headers retrieves the list of kernel headers directories from
 // TARGET_BOARD_KERNEL_HEADERS and TARGET_PRODUCT_KERNEL_HEADERS variables in
 // a makefile for compilation. See
-// https://android.googlesource.com/platform/build/+/master/core/config.mk
+// https://android.googlesource.com/platform/build/+/main/core/config.mk
 // for more details on them.
 func kernelHeadersFactory() android.Module {
 	module, library := NewLibrary(android.HostAndDeviceSupported)