Fix package name

Author: stympy

.github/workflows/docker-build.yml

@@ -64,7 +64,7 @@ jobs:
     - name: Delete old images
       uses: actions/delete-package-versions@v5
       with:
-        package-name: ${{ env.IMAGE_NAME }}
+        package-name: honeybadger-mcp-server
         package-type: container
         min-versions-to-keep: 10
       continue-on-error: true