Update Ruby versions

.devcontainer/Dockerfile

@@ -77,15 +77,15 @@ RUN ARCH=$(dpkg --print-architecture) && \
 USER node
 
 # Install rbenv and ruby-build
-ARG RUBY_VERSION=3.4.7
+ARG RUBY_VERSION=4.0.1
 RUN git clone https://github.com/rbenv/rbenv.git ~/.rbenv && \
   git clone https://github.com/rbenv/ruby-build.git ~/.rbenv/plugins/ruby-build && \
   echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.zshrc && \
   echo 'eval "$(rbenv init - zsh)"' >> ~/.zshrc && \
   echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.bashrc && \
   echo 'eval "$(rbenv init - bash)"' >> ~/.bashrc
 
-# Install Ruby 3.4.7
+# Install Ruby
 ENV PATH="/home/node/.rbenv/bin:/home/node/.rbenv/shims:$PATH"
 RUN rbenv install ${RUBY_VERSION} && \
   rbenv global ${RUBY_VERSION} && \

.github/workflows/copilot-setup-steps.yml

@@ -31,7 +31,7 @@ jobs:
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: 3.4
+          ruby-version: 4.0
 
       - name: Install dependencies
         run: |

.github/workflows/macos.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: macos-latest
     strategy:
       matrix:
-        ruby: [ head, 3.4 ]
+        ruby: [ head, 4.0 ]
     timeout-minutes: 10
     env:
       RUBYOPT: --enable-frozen-string-literal --debug-frozen-string-literal

.github/workflows/ubuntu.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby: [ head, 3.4, 3.3, 3.2 ]
+        ruby: [ head, 4.0, 3.4, 3.3 ]
     timeout-minutes: 10
     env:
       RUBYOPT: --enable-frozen-string-literal --debug-frozen-string-literal

.github/workflows/windows.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: windows-latest
     strategy:
       matrix:
-        ruby: [ '3.4' ]
+        ruby: [ 4.0 ]
     timeout-minutes: 10
     env:
       RUBYOPT: --enable-frozen-string-literal --debug-frozen-string-literal