bump compat for Krylov kit to "0.6, 0.7" from "0.6"

[Krastanov]

Checklist

• Appropriate tests were added
• Any code changes were done in a way that does not break public API
• All documentation related to code changes were updated
• The new code follows the
  contributor guidelines, in particular the SciML Style Guide and
  COLPRAC.
• Any new documentation only uses public API

Additional context

No idea why CompatHelper did not pick this up automatically...

I have not done any testing, consider me just a meatbag CompatHelper bot.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 24.48%. Comparing base (f5282e5) to head (0cfc183).

Additional details and impacted files

@@             Coverage Diff             @@
##             main     #499       +/-   ##
===========================================
- Coverage   62.85%   24.48%   -38.38%     
===========================================
  Files          29       29               
  Lines        2229     2222        -7     
===========================================
- Hits         1401      544      -857     
- Misses        828     1678      +850     

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