ci: prevent action running on forks (#1499)

.github/workflows/pkg.pr.new.yml

@@ -14,6 +14,7 @@ jobs:
   build:
     name: Publish Test Packages
     runs-on: ubuntu-22.04
+    if: ${{ github.repository == 'wxt-dev/wxt' }}
     steps:
       - name: Checkout
         uses: actions/checkout@v4

.github/workflows/vhs.yml

@@ -12,6 +12,7 @@ jobs:
   vhs:
     name: Create VHS
     runs-on: ubuntu-22.04
+    if: ${{ github.repository == 'wxt-dev/wxt' }}
     permissions:
       contents: write
     steps: