Fix build matrix conditional deployment

Author: nblumhardt

appveyor.yml

@@ -15,23 +15,20 @@ artifacts:
 - path: artifacts/Serilog.*.nupkg
 - path: artifacts/Serilog.*.snupkg
 
-for:
--
-  matrix:
-    only:
-      - image: Visual Studio
-  deploy:
-  - provider: NuGet
-    api_key:
-      secure: 60gpLnipFCiKLpS7ECI1C6EPJW27KzVwqrBVkEzX6FIMTmsG//HD3p8Oq7WdQPm8
-    on:
-      branch: /^(main|dev)$/
-  - provider: GitHub
-    auth_token:
-      secure: p4LpVhBKxGS5WqucHxFQ5c7C8cP74kbNB0Z8k9Oxx/PMaDQ1+ibmoexNqVU5ZlmX
-    artifacts:
-      /Serilog.*\.nupkg/
-      /Serilog.*\.snupkg/
-    tag: v$(appveyor_build_version)
-    on:
-      branch: main
+deploy:
+- provider: NuGet
+  api_key:
+    secure: 60gpLnipFCiKLpS7ECI1C6EPJW27KzVwqrBVkEzX6FIMTmsG//HD3p8Oq7WdQPm8
+  on:
+    branch: /^(main|dev)$/
+    image: Visual Studio 2022
+- provider: GitHub
+  auth_token:
+    secure: p4LpVhBKxGS5WqucHxFQ5c7C8cP74kbNB0Z8k9Oxx/PMaDQ1+ibmoexNqVU5ZlmX
+  artifacts:
+    /Serilog.*\.nupkg/
+    /Serilog.*\.snupkg/
+  tag: v$(appveyor_build_version)
+  on:
+    branch: main
+    image: Visual Studio 2022