MODULES-11577 chore(ruby): upgrade Ruby from 2.7 to 3.1

Author: imaqsood

.github/workflows/nightly.yml

@@ -27,11 +27,11 @@ jobs:
         ref: ${{ github.event.pull_request.head.sha }}
       if: ${{ github.repository_owner == 'puppetlabs' }}
 
-    - name: Activate Ruby 2.7
+    - name: Activate Ruby 3.1
       uses: ruby/setup-ruby@v1
       if: ${{ github.repository_owner == 'puppetlabs' }}
       with:
-        ruby-version: "2.7"
+        ruby-version: "3.1"
         bundler-cache: true
 
     - name: Print bundle environment
@@ -67,10 +67,10 @@ jobs:
       with:
         ref: ${{ github.event.pull_request.head.sha }}
 
-    - name: Activate Ruby 2.7
+    - name: Activate Ruby 3.1
       uses: ruby/setup-ruby@v1
       with:
-        ruby-version: "2.7"
+        ruby-version: "3.1"
         bundler-cache: true
 
     - name: Print bundle environment