[MINOR] docs: Update MAINTAINERS.md (#3473)

### What changes were proposed in this pull request?

Add Brandon into contributor list

### Why are the changes needed?

fix: #3361

Author: Lanznx

MAINTAINERS.md

@@ -49,6 +49,7 @@ Contributors may be added by existing maintainers (see [Governance document](GOV
 | JieBao Xiao    | xloya               | Xiaomi           |
 | Can Cai        | caican00            | Xiaomi           |
 | Peidian Li     | coolderli           | Xiaomi           |
+| Brandon Lu     | Lanznx              | LINE             |
 | Lewis Jackson  | xnge                | opensource4you   |
 | Li-Hsing Liu   | austin362667        | opensource4you   |
 | Li Tianhang    | TEOTEO520           | Bilibili         |