Update submodule public_regulated_data_types to latest Thu May 5 00:3…

…8:52 UTC 2022

    - public_regulated_data_types in PX4/Firmware (16a0c28): OpenCyphal/public_regulated_data_types@0a773b9
    - public_regulated_data_types current upstream: OpenCyphal/public_regulated_data_types@d0bd651
    - Changes: OpenCyphal/public_regulated_data_types@0a773b9...d0bd651

    d0bd651 2022-04-09 Pavel Kirienko - Update branding
1565632 2021-10-15 Pavel Kirienko - Replace DS-015 with UDRAL (#125)
b02e689 2021-09-11 Pavel Kirienko - Add status badge
addb060 2021-09-11 Kalyan Sriram - ci: switch to github actions (#122)