Only add private SSH keys and clone submodules in the original repo (#3225)

.github/workflows/release.yml

@@ -42,6 +42,7 @@ jobs:
   enterprise:
     name: Create App Bundle Enterprise
     runs-on: ubuntu-latest
+    if: github.repository == 'element-hq/element-x-android'
     concurrency:
       group: ${{ format('build-release-main-gplay-{0}', github.sha) }}
       cancel-in-progress: true
@@ -49,6 +50,7 @@ jobs:
       - uses: actions/checkout@v4
       - name: Add SSH private keys for submodule repositories
         uses: webfactory/ssh-agent@v0.9.0
+        if: github.repository == 'element-hq/element-x-android'
         with:
           ssh-private-key: ${{ secrets.ELEMENT_ENTERPRISE_DEPLOY_KEY }}
       - name: Clone submodules