ci: only run mirror to tangled on npmx repo (#1351)

Author: jonathanyeong

.github/workflows/mirror-tangled.yml

@@ -13,6 +13,7 @@ permissions:
 jobs:
   mirror:
     name: 🕸️ Mirror to Tangled
+    if: ${{ github.repository == 'npmx-dev/npmx.dev' }}
     runs-on: ubuntu-24.04-arm
 
     steps: