Build account plugin on stable-3.12

Change-Id: Id2e1799776a3c5b05b4b3d1f85bb2c1ee447148a

jenkins/gerrit-bazel-plugin-account.yaml

diff --git a/jenkins/gerrit-bazel-plugin-account.yaml b/jenkins/gerrit-bazel-plugin-account.yaml
index 940bdde..e31e102 100644
--- a/jenkins/gerrit-bazel-plugin-account.yaml
+++ b/jenkins/gerrit-bazel-plugin-account.yaml
@@ -39,6 +39,13 @@
 
 - project:
     name: account
+    jobs:
+      - 'plugin-{name}-bazel-{branch}':
+          branch:
+            - stable-3.12
+
+- project:
+    name: account-gh
     repo: account
     organization: GerritForge
     jobs: