fix: add bundler: none to Ruby CI to avoid OpenSSL error

Set bundler: none in ruby/setup-ruby and manually install bundler after
Ruby setup to avoid OpenSSL errors when the action tries to auto-install
bundler on macOS runners with Ruby builds that lack OpenSSL support.

Author: Goldziher

.github/workflows/ci-ruby.yaml

@@ -145,9 +145,16 @@ jobs:
         uses: ruby/setup-ruby@v1
         with:
           ruby-version: "3.2"
+          bundler: none
           bundler-cache: false
           working-directory: packages/ruby
 
+      - name: Install Bundler
+        shell: bash
+        run: |
+          gem install bundler -v '~> 4.0' --no-document || gem install bundler --no-document
+          bundler --version
+
       - name: Set BUNDLE_GEMFILE (Unix)
         if: runner.os != 'Windows'
         shell: bash
@@ -544,9 +551,16 @@ jobs:
         uses: ruby/setup-ruby@v1
         with:
           ruby-version: "3.2"
+          bundler: none
           bundler-cache: false
           working-directory: packages/ruby
 
+      - name: Install Bundler
+        shell: bash
+        run: |
+          gem install bundler -v '~> 4.0' --no-document || gem install bundler --no-document
+          bundler --version
+
       - name: Set BUNDLE_GEMFILE (Unix)
         if: runner.os != 'Windows'
         shell: bash