build: Tests against Ruby 3.3

Author: Stranger6667

.github/workflows/build.yml

@@ -453,7 +453,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-22.04, macos-12, windows-2022]
-        ruby-version: ["2.7", "3.2"]
+        ruby-version: ["2.7", "3.2", "3.3"]
 
     name: Ruby ${{ matrix.ruby-version }} on ${{ matrix.os }}
     runs-on: ${{ matrix.os }}