chore(deps): update dependency ujson to v5.12.0 [security]

Author: renovate[bot]

dist_vercel/requirements.txt

@@ -32,7 +32,7 @@ sniffio==1.3.1
 starlette==0.46.0
 typer==0.15.2
 typing-extensions==4.12.2
-ujson==5.10.0
+ujson==5.12.0
 uvicorn==0.34.0
 uvloop==0.21.0
 watchfiles==1.0.4