[CI] Reduce GHA timeouts from 6h default (#14704)

* [CI] Reduce GHA timeouts from 6h default

The goal here is to never interfere with a real run (so most of the
timeout-minutes values seem rather high) but to avoid having 6h long
runs if something goes crazy and never ends.

Signed-off-by: Rick Elrod <rick@elrod.me>

* Do bash hackery instead

Signed-off-by: Rick Elrod <rick@elrod.me>

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Signed-off-by: Rick Elrod <rick@elrod.me>

.github/workflows/pr_body_check.yml

@@ -10,6 +10,7 @@ jobs:
     if: github.repository_owner == 'ansible' && endsWith(github.repository, 'awx')
     name: Scan PR description for semantic versioning keywords
     runs-on: ubuntu-latest
+    timeout-minutes: 20
     permissions:
       packages: write
       contents: read