fix: not_ to return a Callable not an object

[dpinol]

Otherwise, mypy complains "error: "object" not callable [operator]"

[codspeed-hq]

Merging this PR will not alter performance

✅ 9 untouched benchmarks

---

_{Comparing dpinol:typing-not (e8a2252) with main (0df7a8b)}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (0df7a8b) to head (e8a2252).

Additional details and impacted files

@@            Coverage Diff            @@
##              main       #16   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           34        34           
  Lines         4713      4713           
  Branches      1020      1020           
=========================================
  Hits          4713      4713           

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[Solganis]

Hi! Thanks for PR.

I'am on vacation for a week.

Will merge it and check after, how did I miss it.

ty is the main gate by the way.