[KYUUBI #2369] [Improvement] update developer.md to describe what append descriptions of new configurations to settings.md

### _Why are the changes needed?_

update developer.md to describe what append descriptions of new configurations to settings.md

### _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.apache.org/docs/latest/develop_tools/testing.html#running-tests) locally before make a pull request

Closes #2372 from zhaomin1423/2369.

Closes #2369

a044c15 [Min Zhao] [KYUUBI #2369] [Improvement] update developer.md to describe what append descriptions of new configurations to settings.md
56f878a [Min Zhao] [KYUUBI #2369] [Improvement] update developer.md to describe what append descriptions of new configurations to settings.md
581894b [Min Zhao] [KYUUBI #2369] [Improvement] update developer.md to describe what append descriptions of new configurations to settings.md

Authored-by: Min Zhao <zhaomin1423@163.com>
Signed-off-by: Kent Yao <yao@apache.org>

Author: zhaomin1423

docs/develop_tools/developer.md

@@ -58,3 +58,11 @@ with [google-java-format](https://github.com/google/google-java-format) and [Sca
 to format the Java and Scala code.
 
 You can run `dev/reformat` to format all Java and Scala code.
+
+
+## Append descriptions of new configurations to settings.md
+
+Kyuubi uses settings.md to explain available configurations.
+
+You can run `KYUUBI_UPDATE=1 build/mvn clean install -Pflink-provided,spark-provided,hive-provided -DwildcardSuites=org.apache.kyuubi.config.AllKyuubiConfiguration`
+to append descriptions of new configurations to settings.md.