Add mrajashree as member in kubernetes-sigs org

Hi, I'm a member of the [kubernetes org](https://github.com/kubernetes/org/blob/c0adbc758d3f0354f260cf06ec78875e6870ece6/config/kubernetes/org.yaml#L894) and would like to get added to the kubernetes-sigs org. I referred [this membership](https://github.com/kubernetes/community/blob/master/community-membership.md#kubernetes-ecosystem) guide, which says:
> "If you are a member of one of these Orgs, you are implicitly eligible for membership in related orgs, and can request membership when it becomes relevant, by creating a PR directly "

So I'm opening this PR, let me know if I need to open an issue instead. Thanks!

config/kubernetes-sigs/org.yaml

@@ -518,6 +518,7 @@ members:
 - moshloop
 - mowangdk
 - mpherman2
+- mrajashree
 - MrHohn
 - mritunjaysharma394
 - mrmrcoleman