fix: default skipped CodeQL state explicitly

Author: msukkari

.github/workflows/vulnerability-triage.yml

@@ -940,7 +940,7 @@ jobs:
           REPOSITORY: ${{ github.repository }}
           TEAM_UUID: ${{ steps.match.outputs.team_uuid }}
           DONE_STATE_ID: ${{ steps.match.outputs.done_state_id }}
-          SKIP_CODEQL: ${{ inputs.skip_codeql }}
+          SKIP_CODEQL: ${{ inputs.skip_codeql || false }}
         run: |
           set -euo pipefail
           # The job only reaches this step after every configured scanner