fix wrong syntax

Author: knoxfighter

.github/workflows/test-workflow.yml

@@ -19,7 +19,7 @@ jobs:
  runs-on: ubuntu-latest
  steps:
  - uses: rlespinasse/github-slug-action@v3.x
- - run: echo ${{ GITHUB_REPOSITORY_OWNER_PART }}
+ - run: echo $GITHUB_REPOSITORY_OWNER_PART
  - name: Cancel this build
  uses: andymckay/cancel-action@0.2
  if: github.event_name == 'pull_request' && env.GITHUB_REPOSITORY_OWNER_PART != "OpenFactorioServerManager"