Fix missing info in README and config error (#3633)

### What problem does this PR solve?

_Briefly describe what this PR aims to solve. Include background context
that will help reviewers understand the purpose of the PR._

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

Signed-off-by: jinhai <haijin.chn@gmail.com>

conf/service_conf.yaml

@@ -18,7 +18,7 @@ es:
   username: 'elastic'
   password: 'infini_rag_flow'
 infinity:
-  uri: 'http://infinity:23817'
+  uri: 'infinity:23817'
   db_name: 'default_db'
 redis:
   db: 1