Remove @Dindihub from the techdocs team at end of LFX 24T2

[chalin]

Originally posted by @chalin in https://github.com/cncf/techdocs/issues/261#issuecomment-2201283036

FYI, @nate-double-u - I've added @Dindihub to the techdocs team with Read-only access so that GH actions will run for her PRs with me having to intervene. We can revoke access at the end of the term.