build: fix release action (#240)

When we are not on the upstream repo, don't run the release action

Co-authored-by: Justin Beckwith <beckwith@google.com>

Author: XhmikosR

.github/workflows/ci.yaml

@@ -51,7 +51,7 @@ jobs:
       - run: npm ci
       - run: npm run docs-test
   release:
-    if: github.ref == 'refs/heads/master'
+    if: github.repository == 'JustinBeckwith/linkinator' && github.ref == 'refs/heads/master'
     runs-on: ubuntu-latest
     needs: [test, lint]
     steps: