ci: set timeout in teardown surge deployments (#779)

Ensure the step doesn't take too much time.
A slack message is sent in case of timeout.

### Notes

Covers #771

### Resources

GitHub docs:
https://docs.github.com/en/actions/writing-workflows/workflow-syntax-for-github-actions#jobsjob_idstepstimeout-minutes

.github/workflows/teardown-inactive-surge-deployments.yml

@@ -14,8 +14,9 @@ jobs:
   teardown_inactive_deployement:
     runs-on: ubuntu-22.04
     steps:
-      - name: Teardown surge deployement inactive than more 1 month
+      - name: Teardown deployments older than 1 month
         uses: adrianjost/actions-surge.sh-teardown@v1.0.3
+        timeout-minutes: 10
         with:
           regex: '[1-9]+ month.? ago'
         env: