ci(deps): update ruby/setup-ruby action to v1.238.0

Author: renovate[bot]

.github/workflows/build-and-deploy.yml

@@ -50,7 +50,7 @@ jobs:
           path: pages
           ref: gh-pages
       - name: Setup Ruby
-        uses: ruby/setup-ruby@v1.237.0
+        uses: ruby/setup-ruby@v1.238.0
         with:
           working-directory: slides-markdown/shared-slides
       - name: Setup Chrome

.github/workflows/markdown-slides.yml

@@ -39,7 +39,7 @@ jobs:
       - name: Remove Hugo Installer
         run: rm hugo.deb
       - name: Setup Ruby
-        uses: ruby/setup-ruby@v1.237.0
+        uses: ruby/setup-ruby@v1.238.0
         with:
           working-directory: slides-markdown/shared-slides
       - name: Run the pre-processor