Bump third_party/openthread/repo from `102a631` to `d4155e4` (#28917)

Bumps [third_party/openthread/repo](https://github.com/openthread/openthread) from `102a631` to `d4155e4`.
- [Release notes](https://github.com/openthread/openthread/releases)
- [Commits](https://github.com/openthread/openthread/compare/102a631cb3f8938389d0d10199a14c59184039cd...d4155e4e5f2a74cc50a545aa3dfb78f558dc117b)

---
updated-dependencies:
- dependency-name: third_party/openthread/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/openthread/repo b/third_party/openthread/repo
index 102a631..d4155e4 160000
--- a/third_party/openthread/repo
+++ b/third_party/openthread/repo
@@ -1 +1 @@
-Subproject commit 102a631cb3f8938389d0d10199a14c59184039cd
+Subproject commit d4155e4e5f2a74cc50a545aa3dfb78f558dc117b