Add back discord uploader

[no changelog]

.github/workflows/build.yml

@@ -14,6 +14,8 @@ jobs:
         steps:
             -   uses: actions/checkout@v4
                 name: Checkout repository
+                with:
+                    fetch-tags: true
             -   name: Set up JDK 21
                 uses: actions/setup-java@v4
                 with:
@@ -28,9 +30,10 @@ jobs:
                 with:
                     path: build/libs/Firmament-*.jar
             -   name: Move build artifact around
-              id: artifact-rename
                 run: |
                     rm -f build/libs/*sources*.jar
-                  newfilename=build/libs/Firmament-$(git rev-parse --short HEAD).jar
-                  echo filename=$newfilename >>"$GITHUB_OUTPUT"
-                  mv build/libs/Firmament-*.jar $newfilename
+            -   name: Upload to discord
+                run: |
+                    curl "$WEBHOOK_URL" -X POST -H "Content-type: multipart/form-data" --form "files[0]=@$(echo build/libs/*.jar)"
+                env:
+                    WEBHOOK_URL: ${{ secrets.WEBHOOK_URL }}