Add discord notification testing workflow

.github/workflows/discordNotification.yml

@@ -0,0 +1,22 @@
+name: Discord Notification Test
+
+env:
+  itchio_channel: windows
+  BuildName: UnderRunner X.Y.Z
+  ReleaseBody: "Changelog: \n Add: Something"
+
+on: workflow_dispatch
+
+jobs:
+  discordMessage:
+    name: Discord Notification
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@master
+      - name: send custom message with args
+        uses: appleboy/discord-action@master
+        with:
+          webhook_id: ${{ secrets.WEBHOOK_ID }}
+          webhook_token: ${{ secrets.WEBHOOK_TOKEN }}
+          message: "@here ${{ env.BuildName }} is out on https://undermakersinteractive.itch.io/underrunner \n ${{ env.ReleaseBody }} "