fixup! ci: upgrade Ruby version to 3.2 in ceph-backend-test job

Author: Kerkesni

.github/workflows/tests.yaml

@@ -584,7 +584,7 @@ jobs:
         ruby-version: '3.2'
     - name: Install Ruby dependencies
       run: |
-        gem install nokogiri:1.12.5 excon:0.109.0 fog-aws:1.3.0 json:2.7.6 mime-types:3.5.2 rspec:3.5
+        gem install nokogiri:1.15.5 excon:0.111.0 fog-aws:3.19.0 json:2.7.6 mime-types:3.5.2 rspec:3.12.0
     - name: Install Java dependencies
       run: |
         sudo apt-get update && sudo apt-get install -y --fix-missing default-jdk maven