submodule: bump third_party/openthread/repo from `eaa2779` to `3d3ed4f` (#1856)

Bumps [third_party/openthread/repo](https://github.com/openthread/openthread) from `eaa2779` to `3d3ed4f`.
- [Commits](https://github.com/openthread/openthread/compare/eaa2779047c3bf781874954e82c716239460c5f7...3d3ed4fbc156f9909161db2a4b39c57f999f2b5f)

---
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 eaa2779..3d3ed4f 160000
--- a/third_party/openthread/repo
+++ b/third_party/openthread/repo
@@ -1 +1 @@
-Subproject commit eaa2779047c3bf781874954e82c716239460c5f7
+Subproject commit 3d3ed4fbc156f9909161db2a4b39c57f999f2b5f