[skip-ci][COMMUNITY] leandron to PMC (#10448)

CONTRIBUTORS.md

@@ -55,7 +55,7 @@ We do encourage everyone to work anything they are interested in.
 - [Thierry Moreau](https://github.com/tmoreau89) (PMC): @tmoreau89 - vta
 - [Kazutaka Morita](https://github.com/kazum): @kazum - frontends, opencl
 - [Trevor Morris](https://github.com/trevor-m): @trevor-m - byoc, compiler
-- [Leandro Nunes](https://github.com/leandron): @leandron - tvmc
+- [Leandro Nunes](https://github.com/leandron) (PMC): @leandron - tvmc
 - [Lily Orth-Smith](https://github.com/electriclilies): @electriclilies - relay
 - [Krzysztof Parzyszek](https://github.com/kparzysz-quic): @kparzysz-quic - hexagon, llvm
 - [Andrew Reusch](https://github.com/areusch): (PMC) @areusch - runtime, microTVM