ci: don't run twice on renovate PRs

Author: oplik0

.github/workflows/test.yml

@@ -1,6 +1,8 @@
 on:
   push:
   pull_request:
+    branches-ignore:
+      - renovate/** # ignore renovate PRs
 
 permissions:
   contents: read
@@ -187,4 +189,4 @@ jobs:
         working-directory: nodebb
       - name: Run tests
         run: npm test test/plugins-installed.js
-        working-directory: nodebb
+        working-directory: nodebb