build(deps): update readthedocs/actions action to v1.5

Author: serious-scaffold[bot]

.github/workflows/readthedocs-preview.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
       - name: Add Read the Docs preview's link to pull request
-        uses: readthedocs/actions/preview@cc0920454cf03ca8a3fbd3cbaa2ce2e509e70636 # v1.2
+        uses: readthedocs/actions/preview@b8bba1484329bda1a3abe986df7ebc80a8950333 # v1.5
         with:
           project-slug: ss-python
 on: