Update dependency ruby to v3.4.8

Author: renovate[bot]

.github/workflows/ci.yaml

@@ -21,7 +21,7 @@ jobs:
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1
       with:
-        ruby-version: '3.3'
+        ruby-version: '3.4.8'
         bundler-cache: true
       timeout-minutes: 30
     - name: Get manageiq.org repo