Pin GH actions to SHA to avoid mutable refs (#2126)

.github/workflows/announce-release-on-discord.yml

@@ -4,7 +4,6 @@ on:
     workflows: ["Upload release assets"]
     types:
       - completed
-
 jobs:
   send_announcement:
     runs-on: ubuntu-latest
@@ -14,7 +13,7 @@ jobs:
           DISCORD_WEBHOOK: ${{ secrets.DISCORD_WEBHOOK }}
           DISCORD_USERNAME: FastAsyncWorldEdit Release
           DISCORD_AVATAR: https://raw.githubusercontent.com/IntellectualSites/Assets/main/plugins/FastAsyncWorldEdit/FastAsyncWorldEdit.png
-        uses: Ilshidur/action-discord@0.3.2
+        uses: Ilshidur/action-discord@0c4b27844ba47cb1c7bee539c8eead5284ce9fa9 # ratchet:Ilshidur/action-discord@0.3.2
         with:
           args: |
             "<@&525015715300900875> <@&706463154804097105> <@&671372968462516240>"