OpenArm CAN 1.2.9

What's Changed

• release: Add missing dh-python dependency by @kou in #118
• Grammar improvements by @bkmgit in #123
• packages: add missing python3-numpy dependency by @abetomo in #128
• feat: introduce unified CLI tool for OpenArm/DAMIAO motors by @abetomo in #129
• feat: add -h/--help option to openarm-can-motor-sampling-check by @abetomo in #130
• Fix license header by @abetomo in #131

Full Changelog: 1.2.8...1.2.9