Update dev-hato/actions-update-gitleaks action to v0.0.20

Author: renovate[bot]

.github/workflows/update-gitleaks.yml

@@ -29,7 +29,7 @@ jobs:
           cache: npm
       - name: Install packages
         run: npm ci --prefer-offline
-      - uses: dev-hato/actions-update-gitleaks@v0.0.19
+      - uses: dev-hato/actions-update-gitleaks@v0.0.20
         with:
           github-token: ${{secrets.GITHUB_TOKEN}}
           repo-name: ${{ github.event.pull_request.head.repo.full_name }}