Fix github actions

Author: sdaubert

.github/workflows/specs.yml

@@ -12,10 +12,10 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest]
-        ruby: ['2.5', '2.6', '2.7', '3.0', '3.1', '3.2']
+        ruby: ['3.0', '3.1', '3.2', '3.3', '3.4']
     runs-on: ${{ matrix.os }}
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Install dependencies
       run: sudo apt-get update -qq && sudo apt-get install libpcap-dev -qq
     - name: Set up Ruby