[Community] @manupa-arm -> Committer (apache#8870)

* adding Manupa to the contributors list

* re-trigger CI

CONTRIBUTORS.md

@@ -41,6 +41,7 @@ We do encourage everyone to work anything they are interested in.
 - [Animesh Jain](https:/anijain2305): @anijain2305 - quantization, relay
 - [Chenfan Jia](https:/jcf94): @jcf94 - auto_scheduler
 - [Ziheng Jiang](https:/ZihengJiang) (PMC): @ZihengJiang - relay, compiler
+- [Manupa Karunaratne](https:/manupa-arm): @manupa-arm - ethos-u, memory planner
 - [Marisa Kirisame](https:/MarisaKirisame): @MarisaKirisame - relay
 - [Wuwei Lin](https:/vinx13): @vinx13 - relay, topi
 - [Yizhi Liu](https:/yzhliu) (PMC): @yzhliu - jvm, topi, relay