add GITHUB_AUTH_HEADER for the github mcp server

Author: m-y-mo

.github/workflows/smoketest.yaml

@@ -45,6 +45,8 @@ jobs:
       - name: Run tests
         env:
           COPILOT_TOKEN: ${{ secrets.COPILOT_TOKEN }}
+          GITHUB_AUTH_HEADER: "Bearer ${{ secrets.GITHUB_TOKEN }}"
+
         run: |
           source .venv/bin/activate
           python main.py -p GitHubSecurityLab/seclab-taskflow-agent/personalities/assistant 'explain modems to me please'