OWNERS: master -> main

Change-Id: Ifacd07d48d59ab56d0b254e76b589c5cd2baa5f1

OWNERS

@@ -1,4 +1,4 @@
 per-file powerhint.json = [email protected],[email protected],[email protected],[email protected]
 
 # per-file for Pixel device makefiles, see go/pixel-device-mk-owner-checklist for details.
-per-file *.mk,*/BoardConfig.mk=file:device/google/gs-common:master:/OWNERS
+per-file *.mk,*/BoardConfig.mk=file:device/google/gs-common:main:/OWNERS