ci: update repo init command in build workflow

Remove commented line and add --repo-rev flag to repo init command for consistency with remote branch checking

.github/workflows/build.yml

@@ -154,9 +154,7 @@ jobs:
         FORMATTED_BRANCH="${{ inputs.android_version }}-${{ inputs.kernel_version }}-${{ inputs.os_patch_level }}"
 
         $REPO init -u https://android.googlesource.com/kernel/manifest \
-          -b common-${FORMATTED_BRANCH} 
-        
-        #--repo-rev=v2.16
+          -b common-${FORMATTED_BRANCH} --repo-rev=v2.16
 
         REMOTE_BRANCH=$(git ls-remote https://android.googlesource.com/kernel/common ${FORMATTED_BRANCH})
         DEFAULT_MANIFEST_PATH=.repo/manifests/default.xml