Fix formatting in CHANGELOG.md for code snippet under MigrateToolSchemaCommand.

Author: klapaudius

CHANGELOG.md

@@ -20,7 +20,9 @@
   - Update tool documentation to use StructuredSchema for input/output schemas
 - **Migration Command**
   - Add the MigrateToolSchemaCommand to help developers on tools new StructuredSchema feature migration:
-      php bin/console mcp:migrate-tool-schema \\App\\MCP\\Tools\\MyLegacyTool
+  ```php  
+  php bin/console mcp:migrate-tool-schema \\App\\MCP\\Tools\\MyLegacyTool
+  ```
 
 ### Version 1.4.0
 - **Core Features:**