fix: docker image reference cannot contain uppercase characters

[lenkan]

Using WebOfTrust/keria as the image name causes docker to choke and try to publish to a docker registry hosted at WebOfTrust instead of docker.io. This is what happened here: https://github.com/WebOfTrust/keria/actions/runs/11315384968/job/31466498211

Closes #309

Read more here: https://docs.docker.com/reference/cli/docker/image/tag/

PATH: The path consists of slash-separated components. Each component may contain lowercase letters, digits and separators. A separator is defined as a period, one or two underscores, or one or more hyphens. A component may not start or end with a separator. While the OCI Distribution Specification supports more than two slash-separated components, most registries only support two slash-separated components. For Docker's public registry, the path format is as follows:

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.74%. Comparing base (18d3ad7) to head (be40c0d).
Report is 27 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #311      +/-   ##
==========================================
+ Coverage   93.06%   93.74%   +0.68%     
==========================================
  Files          36       36              
  Lines        7121     7979     +858     
==========================================
+ Hits         6627     7480     +853     
- Misses        494      499       +5     

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[iFergal]

@2byrds can we try a dev release again now that this is merged?

[2byrds]

@2byrds can we try a dev release again now that this is merged?

@iFergal what do you want the version to be?

[iFergal]

@2byrds 0.2.0-dev4 makes sense to me since I guess we haven't moved to the new released keripy version yet (#300)