Update gems and switch to Ruby 3.1

Author: XhmikosR

.github/workflows/ci.yml

@@ -10,7 +10,7 @@ on:
 env:
   FORCE_COLOR: 2
   NODE: 16
-  RUBY: 2.7
+  RUBY: 3.1
 
 jobs:
   test:
@@ -29,15 +29,9 @@ jobs:
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: "${{ env.RUBY }}"
+          ruby-version: ${{ env.RUBY }}
           bundler-cache: true
 
-      - name: Version info
-        run: |
-          ruby --version
-          gem --version
-          bundle --version
-
       - name: Install npm dependencies
         run: npm ci
 
@@ -58,7 +52,8 @@ jobs:
     if: github.repository == 'mdo/github-buttons' && startsWith(github.ref, 'refs/tags/')
 
     steps:
-      - uses: actions/checkout@v3
+      - name: Clone repository
+        uses: actions/checkout@v3
 
       - name: Download docs
         uses: actions/download-artifact@v3

Gemfile.lock

@@ -4,7 +4,7 @@ GEM
     addressable (2.8.0)
       public_suffix (>= 2.0.2, < 5.0)
     colorator (1.1.0)
-    concurrent-ruby (1.1.9)
+    concurrent-ruby (1.1.10)
     em-websocket (0.5.3)
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0)
@@ -39,7 +39,7 @@ GEM
       jekyll (>= 3.7, < 5.0)
     jekyll-watch (2.2.1)
       listen (~> 3.0)
-    kramdown (2.3.1)
+    kramdown (2.3.2)
       rexml
     kramdown-parser-gfm (1.1.0)
       kramdown (~> 2.0)
@@ -50,7 +50,7 @@ GEM
     mercenary (0.4.0)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
-    public_suffix (4.0.6)
+    public_suffix (4.0.7)
     rb-fsevent (0.11.1)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
@@ -79,4 +79,4 @@ DEPENDENCIES
   webrick (~> 1.7)
 
 BUNDLED WITH
-   2.3.9
+   2.3.12