change conda build source back to path: . from url: <repo url>

[ilaflott]

Describe your changes

apparently conda build . will not listen to the . part and defer to what is under the source: key within meta.yaml.

so if we run conda build . followed by conda publish in .github/workflows/publish_conda.yml, we're publishing old code into the package channel, and not the code that's being merged into main from a PR, no buéno.

Issue ticket number and link (if applicable)

see this PR comment and following pipeline outcomes

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• I ran my code
• I tried to make my code readable
• I tried to comment my code
  - [ ] I wrote a new test, if applicable
  - [ ] I wrote new instructions/documentation, if applicable
• I ran pytest and inspected it's output
  - [ ] I ran pylint and attempted to implement some of it's feedback