Fix highlight in ca2256 rule (#49564)

Author: kurnakovv

docs/fundamentals/code-analysis/quality-rules/ca2256.md

@@ -36,7 +36,7 @@ Implement the missing interface members.
 
 ## Example
 
-:::code language="csharp" source="snippets/csharp/all-rules/ca2256.cs" id="snippet1" highlight="30":::
+:::code language="csharp" source="snippets/csharp/all-rules/ca2256.cs" id="snippet1" highlight="25":::
 
 ## When to suppress errors