Bump readthedocs/actions from 1.2 to 1.5 in the github-actions group

Bumps the github-actions group with 1 update: [readthedocs/actions](https://github.com/readthedocs/actions).


Updates `readthedocs/actions` from 1.2 to 1.5
- [Commits](readthedocs/actions@cc09204...b8bba14)

---
updated-dependencies:
- dependency-name: readthedocs/actions
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: github-actions
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/readthedocs-pr-links.yaml

@@ -11,6 +11,6 @@ jobs:
   documentation-links:
     runs-on: ubuntu-latest
     steps:
-      - uses: readthedocs/actions/preview@cc0920454cf03ca8a3fbd3cbaa2ce2e509e70636 # v1.2
+      - uses: readthedocs/actions/preview@b8bba1484329bda1a3abe986df7ebc80a8950333 # v1.5
         with:
           project-slug: "dependency-groups"