ci: Run scheduled tests weekly instead of every three days

[edgarrmondragon]

Summary

Test Plan

Checklist

• My pull request has a descriptive title.
• I have read the CONTRIBUTING guide.
• I have added tests that prove my fix is effective or that my feature works.
• If appropriate, I have added necessary documentation.
• For user-facing changes, refactorings, performance improvements or documentation updates, I have added a changelog entry using Changie.

For both the title of the PR and the changelog entry, prefer simple past tense or constructions with "now". For example:

• Added Client.invite_participants()
• Client.user_activation_settings() now accepts a user_activation_settings keyword argument

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📚 Documentation preview 📚: https://citric--1209.org.readthedocs.build/en/1209/

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (50f8de2) to head (2b8c720).
Report is 35 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main     #1209   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           10        10           
  Lines          489       489           
  Branches        13        13           
=========================================
  Hits           489       489           

Flag	Coverage Δ
integration	91.41% <ø> (ø)
unit	93.25% <ø> (ø)

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud