fix: serailization error when request with an invalid json input (#4714)

src/_bentoml_impl/server/app.py

@@ -411,7 +411,7 @@ async def api_endpoint_wrapper(self, name: str, request: Request) -> Response:
             log_exception(request)
             data = {
                 "error": f"{exc.error_count()} validation error for {exc.title}",
-                "detail": exc.errors(include_context=False),
+                "detail": exc.errors(include_context=False, include_input=False),
             }
             resp = JSONResponse(data, status_code=400)
         except BentoMLException as exc: