fix(ci): correct workflow filename build-website.yml

Author: JohannesHoppe

.github/workflows/trigger-website-rebuild.yml

@@ -12,6 +12,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Trigger angular-schule-website rebuild
-        run: gh workflow run build.yml --repo angular-schule/angular-schule-website
+        run: gh workflow run build-website.yml --repo angular-schule/angular-schule-website
         env:
           GH_TOKEN: ${{ secrets.WEBSITE_DISPATCH_TOKEN }}