Try to fix prerelease tagging

appveyor.yml

@@ -19,21 +19,20 @@ build:
 artifacts:
   - path: Installer\Bootstrapper\bin\Release\FeedCenterSetup.exe
     name: Release
+deploy:
+  - provider: Environment
+    name: GitHub
 for:
   - branches:
       only:
         - main
     deploy:
-      - provider: Environment
+      prerelease: false
-        name: GitHub
-        prerelease: false
 
   - branches:
       only:
         - prerelease
     version: 1.2.0.{build}
     deploy:
-      - provider: Environment
+      prerelease: true
-        name: GitHub
+      tag: $(version)-prerelease
-        prerelease: true
-        tag: $(version)-prerelease