PB-37351: Use ruby/setup-ruby runner

Author: Tecnobutrul

.github/workflows/push_pr_main.yaml

@@ -5,7 +5,7 @@ on: push
 jobs:
   lint:
     name: Passbolt CE Rootless-${{ matrix.rootless}} ${{ matrix.test_name }}
-    runs-on: ubuntu-latest
+    runs-on: ruby/setup-ruby@v1
     strategy:
       matrix:
         test_name:
@@ -23,6 +23,8 @@ jobs:
           PASSBOLT_FLAVOUR: "ce"
           ROOTLESS: ${{ matrix.rootless }}
           TEST_NAME: ${{ matrix.test_name }}
+        with:
+          ruby-version: "3.4.1"
         run: |
           bundle install
-          rake spec:$TEST_NAME
+          bundle exec rake spec:$TEST_NAME