Fix organization casing in docker workflow

[evan-palmer]

Changes Made

This adds a fix for the organization case error that showed up in this build. I also re-enabled the scheduled builds.

Testing

Tested the workflow in this build

[evan-palmer]

I'm going to wait for that run to finish and retry the build to see if the cache worked @amarburg

[evan-palmer]

I forgot that this doesn't have the build stage in #241 and will (eventually) fail. Looking at the repo packages, it looks like the caching is working as expected though and a rolling-cache stage is being produced.

[amarburg]

Update line 133 as well:

*.cache-from=type=registry,ref=ghcr.io/${{ github.repository }}:cache-${{ matrix.ROS_DISTRO }}

It's (non-fatally) failing in CI here

Since it's a PR, it's only building for amd64 and should finish. Will let CI finish...

[evan-palmer]

Good catch. I missed that one

[evan-palmer]

Hypothetically, the PR build that you just triggered should be faster and using the cache from the Non PR build that I triggered earlier. The download activity on the rolling-cache image makes it seem like it is getting used.