s/master/main/

Test: treehugger
Change-Id: Iabb23436d92686b934f2f2609217714b64ae75de
diff --git a/rootdir/etc/public.libraries.android.txt b/rootdir/etc/public.libraries.android.txt
index cacc47c..9be2ef6 100644
--- a/rootdir/etc/public.libraries.android.txt
+++ b/rootdir/etc/public.libraries.android.txt
@@ -1,4 +1,4 @@
-# See https://android.googlesource.com/platform/ndk/+/master/docs/PlatformApis.md
+# See https://android.googlesource.com/platform/ndk/+/main/docs/PlatformApis.md
 libandroid.so
 libaaudio.so
 libamidi.so