Only run the e2e workflows in the upstream repository

The Deploy to Vercel/Netlify buttons copy .github/workflows into the new
repository, where the workflows can't find this repository's Vercel
project and always fail. Skip the jobs outside endformdev/playwright-tutorial.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Author: ostenbom

.github/workflows/endform-tests-on-main.yml

@@ -11,6 +11,9 @@ permissions:
 
 jobs:
   e2e:
+    # Only run in this repository: copies made by the Deploy to Vercel/Netlify
+    # buttons don't have its Vercel project, so the job would always fail there.
+    if: github.repository == 'endformdev/playwright-tutorial'
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code

.github/workflows/endform-tests-on-prs.yml

@@ -11,6 +11,9 @@ permissions:
 
 jobs:
   e2e:
+    # Only run in this repository: copies made by the Deploy to Vercel/Netlify
+    # buttons don't have its Vercel project, so the job would always fail there.
+    if: github.repository == 'endformdev/playwright-tutorial'
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code