CI(deps): Update actions/download-artifact action to v4.1.9 (OSGeo#5245)

Author: renovate[bot]

.github/workflows/post-pr-reviews.yml

@@ -19,7 +19,7 @@ jobs:
     steps:
       - name: Create a .git directory needed by reviewdog
         run: git init
-      - uses: actions/download-artifact@fa0a91b85d4f404e444e00e005971372dc801d16 # v4.1.8
+      - uses: actions/download-artifact@cc203385981b70ca67e1cc392babf9cc229d5806 # v4.1.9
         id: diff
         continue-on-error: true
         with: