chore(deps): update dependency readthedocs/ubuntu to v26

[renovate]

This PR contains the following updates:

Package	Update	Change
readthedocs/ubuntu (source)	major	24.04 → 26.04

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (39686d2) to head (ce2b3d3).
⚠️ Report is 1 commits behind head on master.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff            @@
##            master      #336   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            8         8           
  Lines         1034      1034           
=========================================
  Hits          1034      1034           

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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

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