Set GERRIT_BRANCH to stable-3.12 for local E2E test environment

Change-Id: I3a6ca4b54b7f1b63d42ff4c5c4eb894e4da558f6
diff --git a/setup_local_env/setup.sh b/setup_local_env/setup.sh
index f56ef90..b6cdab4 100755
--- a/setup_local_env/setup.sh
+++ b/setup_local_env/setup.sh
@@ -16,7 +16,7 @@
 
 
 SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
-GERRIT_BRANCH=stable-3.11
+GERRIT_BRANCH=stable-3.12
 GERRIT_CI=https://gerrit-ci.gerritforge.com/view/Plugins-$GERRIT_BRANCH/job
 LAST_BUILD=lastSuccessfulBuild/artifact/bazel-bin/plugins