[ci] Make gh workflow names consistent (facebook#32010)

Super minor change to keep our naming scheme consistent for gh workflows

Author: poteto

.github/workflows/discord_notify.yml …thub/workflows/shared_discord_notify.yml.github/workflows/discord_notify.yml renamed to .github/workflows/shared_discord_notify.yml .github/workflows/discord_notify.yml renamed to .github/workflows/shared_discord_notify.yml

@@ -1,8 +1,8 @@
-name: Discord Notify
+name: (Shared) Discord Notify
 
 on:
   pull_request_target:
-    types: [ labeled ]
+    types: [labeled]
 
 jobs:
   notify:
@@ -18,4 +18,4 @@ jobs:
           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 }}
+          embed-url: ${{ github.event.pull_request.html_url }}