Update Unity version in CI

Author: mikeage

.github/workflows/build.yml

@@ -12,7 +12,7 @@ on:  # yamllint disable-line rule:truthy
       - "v*"
 
 env:
-  UNITY_VERSION: "2019.4.25f1"
+  UNITY_VERSION: "2022.3.48f1"
 jobs:
   configuration:
     if: |