submodule: bump openthread from `cc003b3` to `b76e524` (#68)
submodule: bump openthread from `cc003b3` to `b76e524` (#68)

Bumps [openthread](https://github.com/openthread/openthread) from `cc003b3` to `b76e524`.
- [Commits](https://github.com/openthread/openthread/compare/cc003b3a42f732ad42bc03297f4b52f2b5a350d6...b76e524f7fad49ab905fdae8d655d072bdc4069e)

---
updated-dependencies:
- dependency-name: openthread
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>

Co-authored-by: dependabot[bot] <1c358da00a777d4e9898c1280ab801e2df165188@users.noreply.github.com>
Infineon/ot-ifx-release,openthread/ot-ifx,Infineon/ot-ifx-release,openthread/ot-ifx,Infineon/ot-ifx-release,openthread/ot-ifx