Merge branch 'bugfix/timer-overflow' into 'master'

openthread: update library to fix timer overflow

See merge request espressif/esp-idf!18889

components/openthread/lib

@@ -1 +1 @@
-Subproject commit 9b1ed376db29e826bee30e0b5afe7db585be3c71
+Subproject commit a63a3ae3f371955064c28db2995fac59e7cffb7e