Update debian.yml

Author: SleeplessByte

.github/workflows/debian.yml

@@ -10,10 +10,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v1
-      - name: Set up Ruby 2.7 (debian ruby)
+      - name: Set up Ruby 3.3 (debian ruby)
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: 2.7
+          ruby-version: 3.3
       - name: Install dependencies
         run: |
           sudo apt-get update