[COMMUNITY] Anirudh Sundar Subramaniam -> Committer (#14853)

Please join me in welcoming Anirudh Sundar Subramaniam (@quic-sanirudh) as a new committer in TVM.
Anirudh has been focusing on many aspects of the TVM stack, including LLVM,
TIR, Hexagon, TOPI. His activities:
- [Commits History](https://github.com/apache/tvm/commits?author=quic-sanirudh)
- [Code Review](https://github.com/apache/tvm/pulls?utf8=%E2%9C%93&q=reviewed-by:quic-sanirudh)
- [Community Forum Summary](https://discuss.tvm.apache.org/u/sanirudh/summary)

CONTRIBUTORS.md

@@ -92,6 +92,7 @@ We do encourage everyone to work anything they are interested in.
 - [Lianmin Zheng](https://github.com/merrymercy) (PMC): @merrymercy - autotvm, auto_scheduler, topi, relay
 - [Xiyou Zhou](https://github.com/zxybazh): @zxybazh - relay
 - [wrongtest](https://github.com/wrongtest-intellif) (PMC): @wrongtest-intellif - tir, tvm-script, arith
+- [Anirudh Sundar Subramaniam](https://github.com/quic-sanirudh): @quic-sanirudh
 
 ## Reviewers