Start referring to exposures by label

[emmyoop]

resolves #306

Description

Refer to exposures by their label in docs.

Note: This does not behave the same as metrics without labels. This will default to use the exposure name if the exposure label is blank. Since exposures are already used widely, this prevents the docs site from going unexpectedly sideways.

Checklist

• I have read the contributing guide and understand what's expected of me
• I have signed the CLA
• I have run this code in development and it appears to resolve the stated issue
• I have opened an issue to add/update docs, or docs changes are not required/relevant for this PR
• I have run changie new to create a changelog entry

[github-actions]

Thank you for your pull request! We could not find a changelog entry for this change. For details on how to document a change, see the contributing guide.

[jtcohen6]

Note: This does not behave the same as metrics without labels. This will default to use the exposure name if the exposure label is blank. Since exposures are already used widely, this prevents the docs site from going unexpectedly sideways.

Yes! Makes total sense

[stu-k]

Code looks good 👍 Out of curiosity, is there a reason for removing the package lock?