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

[Krastanov]

Checklist

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

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

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

Additional details and impacted files

```diff @@ 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 ```

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