message: third_party: update mavlink repo
  The PR has been merged to master.
diff: @@ -10,7 +10,7 @@ find_package(Python3 COMPONENTS Interpreter REQUIRED)
  ExternalProject_add(
  mavlink
  GIT_REPOSITORY https://github.com/mavlink/mavlink
  - GIT_TAG 30a33c3bd9728be0c1e18a957291cbd7ff0cf8c2
  + GIT_TAG 0b5b5dabf9c6ae22f2f93f0db9a4e19dcf6f19ac
  PREFIX mavlink
  CONFIGURE_COMMAND Python3::Interpreter
  -m pymavlink.tools.mavgen
  