docs(migration): Fix invalid CLI command reference

Rename the section heading to avoid the docs command validator parsing
"is now" as a CLI subcommand reference in MIGRATION_V2.

Co-Authored-By: Claude <noreply@anthropic.com>

Author: cameroncooke

docs/MIGRATION_V2.md

@@ -187,7 +187,7 @@ For full details on configuration options see [CONFIGURATION.md](CONFIGURATION.m
 
 ## 3. CLI and skills
 
-### xcodebuildmcp is now a CLI
+### CLI mode for xcodebuildmcp
 
 The `xcodebuildmcp` command can now be used directly in the terminal without an MCP client: