chore(deps): update renovatebot/github-action action to v43.0.20 (#2515)

Co-authored-by: Renovate Bot <bot@renovateapp.com>

Author: bitcoin-tools

.github/workflows/validation.yaml

@@ -45,7 +45,7 @@ jobs:
     steps:
       - uses: actions/checkout@v5
       - name: Renovate
-        uses: renovatebot/github-action@v43.0.19
+        uses: renovatebot/github-action@v43.0.20
         with:
           configurationFile: 'resources/config/renovate-config.json'
           token: ${{ secrets.RENOVATE_TOKEN }}