chore(deps): update dependency ruby to v2.7.8

Author: renovate[bot]

.github/workflows/system-tests.yml

@@ -45,7 +45,7 @@ jobs:
       - name: Install Ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: '2.7'
+          ruby-version: '2.7.8'
       - name: Checkout code
         uses: actions/checkout@v4
       - name: Install