Fix release workflow

Author: ryanhcode

.github/workflows/release.yml

@@ -28,6 +28,7 @@ jobs:
       - name: Publish mods
         run: ./gradlew publishMods
         env:
+          DISCORD_WEBHOOK: ${{ secrets.DISCORD_WEBHOOK }}
           CURSEFORGE_API_KEY: ${{ secrets.CURSEFORGE_API_KEY }}
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           MODRINTH_TOKEN: ${{ secrets.MODRINTH_TOKEN }}