revert clickhouse service 25.3 testing

Author: PNixx

.github/workflows/testing.yml

@@ -32,7 +32,7 @@ jobs:
             rails: 8.0.1
           - ruby: 3.2
             rails: 8.1
-        clickhouse: [ '24.9', '25.3' ]
+        clickhouse: [ '24.9' ]
 
     steps:
       - uses: actions/checkout@v4
@@ -81,7 +81,7 @@ jobs:
             rails: 8.0.1
           - ruby: 3.2
             rails: 8.1
-        clickhouse: [ '24.9', '25.3' ]
+        clickhouse: [ '24.9' ]
 
     steps:
       - uses: actions/checkout@v4