kv260 firmware release link is bad

[tcao]

Checked 3 vcs import .repos for kv260 firmware release, all are different, and krs_humble.repos points to nonexist Google doc link.
Please update it to the most recent kv260 release, which is 1.1.1 at:
https://github.com/ros-acceleration/acceleration_firmware_kv260/releases/download/v1.1.1/acceleration_firmware_kv260.zip

[jasvinderkhurana]

@tcao, thanks for pointing this, we are doing internal testing on latest firmware and we will update it in next release.