ROS-Unity tutorial fixes

[at669]

Proposed change(s)

Updates the robo_demo.launch file to be up-to-date, plus minor fixes to links. Additionally, updated the pick-and-place tutorial screenshot for deprecated settings.

Useful links (GitHub issues, JIRA tickets, forum threads, etc.)

• AIRO-1118, 1133
• ROS Unity unable to connect with no connection information #284
• Outdated ROS Settings Instruction and Window in Pick-and-Place Tutorial #292

Types of change(s)

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

Testing and Verification

Test Configuration:

• Unity Version: 2020.3.11
• Unity machine OS + version: MacOS 10.15.7
• ROS machine OS + version: Ubuntu 20.04, ROS Noetic
• ROS–Unity communication: VirtualBox bridged adapter

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