Set up ruby when we set up nodejs

To ensure a consistent environment.

.github/workflows/ci.yaml

@@ -1,3 +1,9 @@
+## Why do we specify bundler-cache: false?
+##
+## Ideally we should turn this on.
+## But this flag runs bundle install and cache, which does not suit our use case here.
+## See https://github.com/ruby/setup-ruby?tab=readme-ov-file#caching-bundle-install-automatically
+
 name: CI
 
 on:
@@ -18,6 +24,9 @@ jobs:
     - uses: actions/setup-node@v4
       with:
         node-version-file: "./.tool-versions"
+    - uses: ruby/setup-ruby@v1
+      with:
+        bundler-cache: false
     - run: npm ci
     - run: npm ci
       working-directory: ./website
@@ -66,6 +75,9 @@ jobs:
     - uses: actions/setup-node@v4
       with:
         node-version-file: "./.tool-versions"
+    - uses: ruby/setup-ruby@v1
+      with:
+        bundler-cache: false
     - run: npm ci
     - run: npm run build
     - working-directory: ./example/reactnative
@@ -81,6 +93,9 @@ jobs:
     - uses: actions/setup-node@v4
       with:
         node-version-file: "./.tool-versions"
+    - uses: ruby/setup-ruby@v1
+      with:
+        bundler-cache: false
     - run: sudo xcode-select -s /Applications/Xcode_15.4.app/Contents/Developer
     - run: npm ci
     - run: npm run build
@@ -100,6 +115,9 @@ jobs:
     - uses: actions/setup-node@v4
       with:
         node-version-file: "./.tool-versions"
+    - uses: ruby/setup-ruby@v1
+      with:
+        bundler-cache: false
     - run: npm ci
     - run: npm run build
     - working-directory: ./example/capacitor
@@ -126,12 +144,6 @@ jobs:
         node-version-file: "./.tool-versions"
     - uses: ruby/setup-ruby@v1
       with:
-        # Do not specify ruby-version so that it picks the version declared in .tool-versions
-        # See https://github.com/ruby/setup-ruby?tab=readme-ov-file#supported-version-syntax
-        # ruby-version: "Unspecified intentionally. See the above comment"
-        # Ideally we should turn this on
-        # But this flag runs bundle install and cache, which does not suit our use case here.
-        # See https://github.com/ruby/setup-ruby?tab=readme-ov-file#caching-bundle-install-automatically
         bundler-cache: false
     - run: sudo xcode-select -s /Applications/Xcode_15.4.app/Contents/Developer
     - run: npm install -g appcenter-cli
@@ -198,6 +210,9 @@ jobs:
     - uses: actions/setup-node@v4
       with:
         node-version-file: "./.tool-versions"
+    - uses: ruby/setup-ruby@v1
+      with:
+        bundler-cache: false
     - run: npm install -g appcenter-cli
     - run: npm ci
     - run: npm run build
@@ -245,6 +260,9 @@ jobs:
     - uses: actions/setup-node@v4
       with:
         node-version-file: "./.tool-versions"
+    - uses: ruby/setup-ruby@v1
+      with:
+        bundler-cache: false
     - run: sudo xcode-select -s /Applications/Xcode_15.4.app/Contents/Developer
     - run: npm install -g appcenter-cli
     - run: npm ci
@@ -307,6 +325,9 @@ jobs:
     - uses: actions/setup-node@v4
       with:
         node-version-file: "./.tool-versions"
+    - uses: ruby/setup-ruby@v1
+      with:
+        bundler-cache: false
     - run: npm install -g appcenter-cli
     - run: npm ci
     - run: npm run build