ci: codecov: increase patch threshold

[maurerle]

Description

I think that prioritising patch coverage too much can be often very hard and does not help a lot. Allow patch coverage to be 20% worse, to be less strict on patch coverage requirements

Checklist

• Consent to release this PR's code under the GNU Affero General Public License v3.0

Additional Notes (optional)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.51%. Comparing base (4998487) to head (7798b4c).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #805   +/-   ##
=======================================
  Coverage   80.51%   80.51%           
=======================================
  Files          56       56           
  Lines        9013     9013           
=======================================
  Hits         7257     7257           
  Misses       1756     1756           

Flag	Coverage Δ
pytest	80.51% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.