upgrade colcon-cargo in pixi.toml for windows CI

[knmcguire]

In this PR of colcon-cargo, colcon-core version has been locked to be higher than 0.19: colcon/colcon-cargo#59

Since the pixi.toml on the ros2 repo locks the colcon-cargo pypi to be less than 0.18 this is causing a dependency issue.

This PR fixes our CI temporary but a PR needs to be made to ROS2 repo pixi.toml file at least to fix this in the long term.

[knmcguire]

Windows CI builds now. The others don't but that's not due to this PR so that must be something else.

@esteve fyi

[jhdcs]

From a quick peek into the CI logs, it looks like the system is having trouble finding the examples_logging_demo and examples_parameter_demo packages.

Do you know of anything that might cause temporary disruption in finding packages? This PR shouldn't affect that, right?

[mxgrey]

The package name problem is another side effect of colcon/colcon-cargo#59

I fixed it in #480 . These are the relevant commits that you can copy into this PR: [1][2]

[knmcguire]

Thanks! The ubuntu CI is still failing though on the tests so not sure what can be a fix for that though.

But indeed, this PR by itself doesn't influence those (at least it shouldn't :) )

[mxgrey]

It looks like parameter_demo still needs to be renamed to examples_parameter_demo.

[jhdcs]

The changes look good, and we have a passing CI! Thank you very much for your help!

Merging...