ci: increase workflow timeout

Author: JesusTheHun

.github/workflows/tests.yml

@@ -15,7 +15,7 @@ jobs:
       && !startsWith(github.event.head_commit.message, 'docs')) ||
       (github.event.issue.pull_request && startsWith(github.event.comment.body, '/test') && github.actor == 'JesusTheHun') ||
       github.event_name == 'workflow_dispatch'
-    timeout-minutes: 20
+    timeout-minutes: 30
     runs-on:
       group: couchbase-runners
       labels: ubuntu-latest-m