Bug: contributor line graph on contributors page does not reflect last 30 days of contributions

[brandonroberts]

Describe the bug

With #2068 we introduced changes to the line graph to show last 30 contributions instead of the last 30 days.

Steps to reproduce

1. Go to contributors page for OpenSauced repos
2. View contributor line graph
3. Notice last 30 days is last 30 contributions

Browsers

No response

Additional context (Is this in dev or production?)

No response

Code of Conduct

• I agree to follow this project's Code of Conduct

Contributing Docs

• I agree to follow this project's Contribution Docs

[github-actions]

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[brandonroberts]

Fixed via #2155