fix(dispatch.yml): update condition for sending notification to Discord to exclude pull request events

fix(dispatch.yml): update condition for dispatching update submodule to exclude pull request events

.github/workflows/dispatch.yml

@@ -28,7 +28,7 @@ jobs:
 
     - name: Send Notification to Discord
       uses: sarisia/actions-status-discord@v1
-      if: failure()
+      if: failure() && github.event_name != 'pull_request'
       with:
         webhook: ${{ secrets.DISCORD_WEBHOOK }}
         status: ${{ job.status }}
@@ -40,6 +40,8 @@ jobs:
 
     needs: validate
 
+    if: github.event_name != 'pull_request'
+
     steps:
     - name: Dispatch Update Submodule to Gakumas-Localify-EN
       uses: peter-evans/repository-dispatch@v3