[AIRO-751] add updating public key

[peifeng-unity]

Proposed change(s)

Add fetching public key from ubuntu keyserver

Types of change(s)

• Bug fix
• New feature
• Code refactor
• Documentation update
• Other (please describe)

Testing and Verification

Tested by rebuilding the image

docker builder prune
docker build -t unity-robotics:pick-and-place -f docker/Dockerfile .

Checklist

• Ensured this PR is up-to-date with the dev branch
• Created this PR to target the dev branch
• Followed the style guidelines as described in the Contribution Guidelines
• Added tests that prove my fix is effective or that my feature works
• Updated the Changelog and described changes in the Unreleased section
• Updated the documentation as appropriate

Other comments

[LaurieCheers-unity]

I have no context but assuming you've tested it this seems fine?

[at669]

tested this change when done on the object pose estimation repo and worked for me!

[peifeng-unity]

I have no context but assuming you've tested it this seems fine?

Oh, yeah, Tested it and it works fine with fetching the key from the keyserver. It seems that the Ubuntu system updated the GPG key some time ago.