Fix commit override from #14298 of api-key to api_key (#14328)

### What problem does this PR solve?

Fix commit override from
https://github.com/infiniflow/ragflow/pull/14298/ of `api-key` to `api_key`

### Type of change

- [x] Refactoring

web/src/utils/api.ts

@@ -174,7 +174,7 @@ export default {
   createSystemToken: `${restAPIv1}/system/tokens`,
   removeSystemToken: `${restAPIv1}/system/tokens`,
   getSystemConfig: `${restAPIv1}/system/config`,
-  setLangfuseConfig: `${restAPIv1}/langfuse/api_key`,
+  setLangfuseConfig: `${restAPIv1}/langfuse/api-key`,
 
   // flow
   listTemplates: `${webAPI}/canvas/templates`,