Fix notify target, add lines (facebook#32006)

.github/workflows/discord_notify.yml

@@ -1,22 +1,21 @@
 name: Discord Notify
 
 on:
-  pull_request:
+  pull_request_target:
     types: [ labeled ]
-    
+
 jobs:
   notify:
-      if: ${{ github.event.label.name == 'React Core Team' }}
-      runs-on: ubuntu-latest
-      steps:
-        - name: Discord Webhook Action
-          uses: tsickert/discord-webhook@v6.0.0
-          with:
-              webhook-url: ${{ secrets.DISCORD_WEBHOOK_URL }}
-              embed-author-name: ${{ github.event.pull_request.user.login }}
-              embed-author-url: ${{ github.event.pull_request.user.html_url }}
-              embed-author-icon-url: ${{ github.event.pull_request.user.avatar_url }}
-              embed-title: '#${{ github.event.number }}: ${{ github.event.pull_request.title }}'
-              embed-description: ${{ github.event.pull_request.body }}
-              embed-url: ${{ github.event.pull_request.html_url }}
-
+    if: ${{ github.event.label.name == 'React Core Team' }}
+    runs-on: ubuntu-latest
+    steps:
+      - name: Discord Webhook Action
+        uses: tsickert/discord-webhook@v6.0.0
+        with:
+          webhook-url: ${{ secrets.DISCORD_WEBHOOK_URL }}
+          embed-author-name: ${{ github.event.pull_request.user.login }}
+          embed-author-url: ${{ github.event.pull_request.user.html_url }}
+          embed-author-icon-url: ${{ github.event.pull_request.user.avatar_url }}
+          embed-title: '#${{ github.event.number }} (+${{github.event.pull_request.additions}} -${{github.event.pull_request.deletions}}): ${{ github.event.pull_request.title }}'
+          embed-description: ${{ github.event.pull_request.body }}
+          embed-url: ${{ github.event.pull_request.html_url }}