make debug output more specific (#151)

Signed-off-by: Tom Hennen <tomhennen@google.com>

Author: TomHennen

actions/slsa_with_provenance/action.yml

@@ -32,7 +32,9 @@ runs:
       if: ${{ startsWith(github.ref, 'refs/tags/') }}
       run: |
         echo "## SLSA Source Properties Tag Push" >> $GITHUB_STEP_SUMMARY
-        echo "github object contents ${{ github }}"
+        echo "github.actor ${{ github.actor }}"
+        echo "github.triggering_actor ${{ github.triggering_actor }}
+        echo "github.event_name ${{ github.event_name }}"
         go run github.com/slsa-framework/slsa-source-poc/sourcetool@f2031f563fc7323ce160313a13d456e4422244c9 --github_token ${{ github.token }} checktag --commit ${{ github.sha }} --owner ${{ github.repository_owner }} --repo ${{ github.event.repository.name }} --tag_name ${{ github.ref_name }} --output_signed_bundle ${{ github.workspace }}/metadata/signed_bundle.intoto.jsonl >> $GITHUB_STEP_SUMMARY
       shell: bash
     - id: summary