build on specific ruby version to ensure they are available (#143)

Author: martinemde

.github/workflows/cd.yml

@@ -28,7 +28,7 @@
               #  https://github.com/oxidize-rb/actions/blob/main/fetch-ci-data/evaluate.rb#L54
               exclude: [arm-linux, x64-mingw32, x64-mingw-ucrt, aarch64-linux-musl]
             stable-ruby-versions: |
-              exclude: [head]
+              only: ['3.2', '3.3', '3.4']
   
     build:
       name: Build native gems

.github/workflows/ci.yml

@@ -16,9 +16,9 @@ jobs:
         uses: oxidize-rb/actions/fetch-ci-data@v1
         with:
           stable-ruby-versions: |
-            # See https://github.com/bytecodealliance/wasmtime-rb/issues/286
-            # for details.
-            exclude: [head]
+            # Explicitly include all Ruby versions we want to support
+            # to ensure binaries are built for each version
+            only: ['3.2', '3.3', '3.4']
   rspec:
     runs-on: ${{ matrix.os }}
     needs: ci-data