Add timeout to pending reviews automation

Although it might not actually help with the job that got stuck for 17h
because that got stuck before it got started, but this is probably
not a bad idea in general.

.github/workflows/pending-reviews.yaml

@@ -9,6 +9,7 @@ jobs:
         name: Pending reviews bot
         runs-on: ubuntu-latest
         environment: Matrix
+        timeout-minutes: 1
         env:
             URL: "https://github.com/pulls?q=is%3Apr+is%3Aopen+repo%3Amatrix-org%2Fmatrix-js-sdk+repo%3Amatrix-org%2Fmatrix-react-sdk+repo%3Aelement-hq%2Felement-web+repo%3Aelement-hq%2Felement-desktop+review-requested%3A%40me+sort%3Aupdated-desc+"
             RELEASE_BLOCKERS_URL: "https://github.com/pulls?q=is%3Aopen+repo%3Amatrix-org%2Fmatrix-js-sdk+repo%3Amatrix-org%2Fmatrix-react-sdk+repo%3Aelement-hq%2Felement-web+repo%3Aelement-hq%2Felement-desktop+sort%3Aupdated-desc+label%3AX-Release-Blocker+"