Update Install in README.md for Rolling

[Amronos]

🦟 Bug fix

Updates/fixes installation instructions for Rolling

Summary

Changed humble to rolling in rosdep install -r --from-paths src -i -y --rosdistro humble
Changed gazebo versions

Checklist

• Signed all commits for DCO
• Added tests
• Updated documentation (as needed)
• Updated migration guide (as needed)
• Consider updating Python bindings (if the library has them)
• codecheck passed (See contributing)
• All tests passed (See test coverage)
• While waiting for a review on your PR, please help review another open pull request to support the maintainers

Note to maintainers: Remember to use Squash-Merge and edit the commit message to match the pull request summary while retaining Signed-off-by messages.