Try Fixing GHA creds

Author: osalpekar

Diff for: .github/workflows/build.yml

@@ -1,6 +1,7 @@
 name: Build
 
 on:
+  pull_request:
   push:
     branches:
       - site
@@ -33,8 +34,8 @@ jobs:
         sudo apt update && sudo apt install python3-pip && sudo -H pip3 install pyrsistent==0.16 notedown pyyaml -Iv nbformat==5.7
 
         ## Configure Bot
-        git config --global user.email "facebook-circleci-bot@users.noreply.github.com"
-        git config --global user.name "Website Deployment Script"
+        git config --global user.email "pytorchbot@pytorch.com"
+        git config --global user.name "pytorchbot"
 
         ## Build Jekyll site and push to master
         ./scripts/deploy-site.sh build