test: update test suite dependencies

Author: Mattia Roccoberton

.github/workflows/specs_mysql_70.yml

@@ -13,7 +13,7 @@ jobs:
 
     strategy:
       matrix:
-        ruby: ['2.7', '3.0']
+        ruby: ['3.0', '3.2']
         gemfile: ['rails_7_0_mysql']
 
     env:

.github/workflows/specs_postgres_70.yml

@@ -13,7 +13,7 @@ jobs:
 
     strategy:
       matrix:
-        ruby: ['2.7', '3.0']
+        ruby: ['3.0', '3.2']
         gemfile: ['rails_7_0_postgres']
 
     env: