Update build workflow to trigger on release events and adjust update job to include token

.gitea/workflows/build.yaml

@@ -1,9 +1,8 @@
 name: Building and publishing Homebrewery as Docker Image
 
 on:
-  push:
-    tags:
-      - v**
+  release:
+    types: [published]
 
 jobs:
   build:

.gitea/workflows/update.yaml

@@ -64,6 +64,7 @@ jobs:
         uses: softprops/action-gh-release@v2
         if: ${{ env.ID > 0 && env.DRAFT != 'true' }}
         with:
+          token: ${{ secrets.GT_UPDATE_TOKEN }}
           prerelease: ${{ env.PRERELEASE }}
           name: ${{ env.NAME }}
           tag_name: ${{ env.TAG_NAME }}