Bump third_party/openthread/repo from d81c6fa to f1e74a0 including QPG fix (#31441)

* Bump third_party/openthread/repo from `d81c6fa` to `f1e74a0`

Bumps [third_party/openthread/repo](https://github.com/openthread/openthread) from `d81c6fa` to `f1e74a0`.
- [Release notes](https://github.com/openthread/openthread/releases)
- [Commits](https://github.com/openthread/openthread/compare/d81c6fab98df8fbeb0f3611ce5ec4c131c84cbce...f1e74a036b5bd2e9dd6565161ab806cc854dc0b4)

---
updated-dependencies:
- dependency-name: third_party/openthread/repo
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

* [QPG] Renaming OT OPENTHREAD_CONFIG_DTLS_ENABLE flag to OPENTHREAD_CONFIG_SECURE_TRANSPORT_ENABLE

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
diff --git a/examples/platform/qpg/project_include/OpenThreadConfig.h b/examples/platform/qpg/project_include/OpenThreadConfig.h
index 585d10f..d6955a9 100644
--- a/examples/platform/qpg/project_include/OpenThreadConfig.h
+++ b/examples/platform/qpg/project_include/OpenThreadConfig.h
@@ -74,7 +74,7 @@
 #define OPENTHREAD_CONFIG_TCP_ENABLE 0
 #define OPENTHREAD_CONFIG_BLE_TCAT_ENABLE 0
 #define OPENTHREAD_CONFIG_TLS_ENABLE 0
-#define OPENTHREAD_CONFIG_DTLS_ENABLE 0
+#define OPENTHREAD_CONFIG_SECURE_TRANSPORT_ENABLE 0
 
 #define OPENTHREAD_ENABLE_VENDOR_EXTENSION 0
 #define OPENTHREAD_EXAMPLES_SIMULATION 0
diff --git a/third_party/openthread/repo b/third_party/openthread/repo
index d81c6fa..f1e74a0 160000
--- a/third_party/openthread/repo
+++ b/third_party/openthread/repo
@@ -1 +1 @@
-Subproject commit d81c6fab98df8fbeb0f3611ce5ec4c131c84cbce
+Subproject commit f1e74a036b5bd2e9dd6565161ab806cc854dc0b4