[CI] Add github-pat to trivy-scan.yml

Adds Github token to the trivy scan in an effort to prevent the
recent CI failures due to TOOMANYREQUESTS on downloading the Trivy
db.

Author: onobc

.github/workflows/trivy-scan.yml

@@ -44,6 +44,7 @@ jobs:
           scan-type: 'fs'
           scan-ref: '${{ env.LOCAL_REPOSITORY_PATH }}/org/springframework/pulsar'
           trivy-config: ${{ inputs.config-path }}
+          github-pat: ${{ secrets.GH_ACTIONS_REPO_TOKEN }}
       - name: Upload Trivy scan results to GitHub Security tab
         if: inputs.upload-results
         uses: github/codeql-action/upload-sarif@v3