Bump actions/checkout from 3 to 4 (#57)

Author: dependabot[bot]

.github/workflows/discord-release.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Github Releases To Discord
         uses: ShonP40/github-releases-to-discord@master
         with: