Update submodule mavlink to latest Wed Aug 7 12:39:25 UTC 2024

    - mavlink in PX4/Firmware (234e2ff): mavlink/mavlink@d65952b
    - mavlink current upstream: mavlink/mavlink@bb52e30
    - Changes: mavlink/mavlink@d65952b...bb52e30

    bb52e30d 2024-08-01 Hamish Willee - comment - use markdown in replaced by to fix rendering (#2137)
6ac37cde 2024-08-01 Hamish Willee - Docs generation improvements (#2139)
139e1b0e 2024-08-01 Hamish Willee - Pymavlink update - primarily for fixes to generator error reporting (#2138)
6ef6f2c0 2024-07-24 Claudio Chies - Yaw Orbit Behaviour - add an option to select system default (#2132)
d219fee8 2024-07-18 Nick E - common.xml: Add "encoding" field to VIDEO_STREAM_INFORMATION (#2127)
a5e324fb 2024-07-18 Julian Oes - common: add camera_device_id to CAMERA_INFORMATION (#2121)