Rename MEMBERS.md back to MAINTAINERS.md

Keep MAINTAINERS.md as the OSS-standard filename while retaining the
current member listing content. Update references in GOVERNANCE.md and
the maintainer nomination templates.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: EItanya

.github/ISSUE_TEMPLATE/kagent-maintainer-nomination.md

@@ -24,5 +24,5 @@ This may include links to GitHub issues and/or GitHub queries showing significan
 **Requirements:**
 
 - [ ] The nominee has met all requirements to be a Maintainer, as outlined in the [contributor ladder](https://github.com/kagent-dev/community/blob/main/CONTRIBUTOR_LADDER.md#maintainer)
-- [ ] I have added the nominee to the list of active maintainers in [MEMBERS.md](https://github.com/kagent-dev/community/blob/main/MEMBERS.md)
+- [ ] I have added the nominee to the list of active maintainers in [MAINTAINERS.md](https://github.com/kagent-dev/community/blob/main/MAINTAINERS.md)
 - [ ] The nominee has added a comment to this PR testifying that they agree to the requirements of becoming a Maintainer, e.g. `I agree to all of the responsibilities and requirements of being a kagent-dev maintainer`.

.github/PULL_REQUEST_TEMPLATE/nominate_a_maintainer.md

@@ -15,5 +15,5 @@ This may include links to GitHub issues and/or GitHub queries showing significan
 **Requirements:**
 
 - [ ] The nominee has met all requirements to be a Maintainer, as outlined in the [contributor ladder](https://github.com/kagent-dev/community/blob/main/CONTRIBUTOR_LADDER.md#maintainer)
-- [ ] I have added the nominee to the list of active maintainers in [MEMBERS.md](https://github.com/kagent-dev/community/blob/main/MEMBERS.md)
+- [ ] I have added the nominee to the list of active maintainers in [MAINTAINERS.md](https://github.com/kagent-dev/community/blob/main/MAINTAINERS.md)
 - [ ] The nominee has added a comment to this PR testifying that they agree to the requirements of becoming a Maintainer, e.g. `I agree to all of the responsibilities and requirements of being a kagent-dev maintainer`.

GOVERNANCE.md

@@ -25,7 +25,7 @@ The kagent project embraces the following values:
 Our governance builds on top of definitions from other documents, review the following files for relevant information:
 
 * [CONTRIBUTOR_LADDER.md](./CONTRIBUTOR_LADDER.md) for the different roles with the project.
-* [MEMBERS.md](./MEMBERS.md) for the project members at all tiers, including their organizational affiliation.
+* [MAINTAINERS.md](./MAINTAINERS.md) for the project members at all tiers, including their organizational affiliation.
 * [Code of Conduct](./CODE-OF-CONDUCT.md) for our code of conduct.
 
 ## Voting