[KYUUBI #4632] [CI] Add rule for labeler to tag module:ui

### _Why are the changes needed?_

Current Labeler mis-tags `module:server` to changes about web-ui.

We should give `module:ui` tag to ui-related PR.

### _How was this patch tested?_
- [ ] Add some test cases that check the changes thoroughly including negative and positive cases if possible

- [ ] Add screenshots for manual tests if appropriate

- [ ] [Run test](https://kyuubi.readthedocs.io/en/master/develop_tools/testing.html#running-tests) locally before make a pull request

Closes #4632 from zwangsheng/ci/labeler_tag_ui.

Closes #4632

33e379d5e [zwangsheng] to low case
801fdc95a [zwangsheng] Add rule fot labeler tag UI

Authored-by: zwangsheng <2213335496@qq.com>
Signed-off-by: Cheng Pan <chengpan@apache.org>

.github/labeler.yml

@@ -102,7 +102,8 @@
 
 "module:server":
   - "bin/kyuubi"
-  - "kyuubi-server/**/*"
+  - "kyuubi-server/src/**/*"
+  - "kyuubi-server/pom.xml"
   - "extension/server/kyuubi-server-plugin/**/*"
 
 "module:spark":
@@ -121,3 +122,6 @@
 
 "module:authz":
   - "extensions/spark/kyuubi-spark-authz/**/*"
+
+"module:ui":
+  - "kyuubi-server/web-ui/**/*"