docs: update README.md

Author: kuyermqi

README.md

@@ -142,7 +142,7 @@ npx deepmatch-mcp \
   --path /path/to/repo2 \
   --provider ollama \
   --ollama-url http://localhost:11434 \
-  --model nomic-embed-text
+  --model qwen3-embedding:0.6b
 ```
 
 **With environment variables:**