Pin laminas/documentation-theme action to 39b159a

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/docs-build.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Build Docs
-        uses: laminas/documentation-theme/github-actions/docs@master
+        uses: laminas/documentation-theme/github-actions/docs@39b159ad354dd71260c68cb7f7abe813d999e3ed # master
         env:
           DEPLOY_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}