Bump third_party/ot-br-posix/repo from `69ce2a5` to `184d298` (#30084)

Bumps [third_party/ot-br-posix/repo](https://github.com/openthread/ot-br-posix) from `69ce2a5` to `184d298`.
- [Release notes](https://github.com/openthread/ot-br-posix/releases)
- [Commits](https://github.com/openthread/ot-br-posix/compare/69ce2a57f59142d705f29757721653e0b32610db...184d2982d28c289420df74453b941cce93e297a8)

---
updated-dependencies:
- dependency-name: third_party/ot-br-posix/repo
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
diff --git a/third_party/ot-br-posix/repo b/third_party/ot-br-posix/repo
index 69ce2a5..184d298 160000
--- a/third_party/ot-br-posix/repo
+++ b/third_party/ot-br-posix/repo
@@ -1 +1 @@
-Subproject commit 69ce2a57f59142d705f29757721653e0b32610db
+Subproject commit 184d2982d28c289420df74453b941cce93e297a8