fix(toHaveFocus): clarify message when using .not

[Dennis273]

What:

The output message is confusing when using expect(element).not.toHaveFocus()

Why:
To avoid confusion.

How:
By updating the output message when isNot is truthy.

Checklist:

• Documentation N/A
• Tests N/A
• Updated Type Definitions N/A
• Ready to be merged
  

[codecov]

Codecov Report

Merging #447 (be9e2d9) into main (4d0ceeb) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##              main      #447   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           26        26           
  Lines          624       626    +2     
  Branches       231       233    +2     
=========================================
+ Hits           624       626    +2     

Impacted Files	Coverage Δ
src/to-have-focus.js	100.00% <100.00%> (ø)

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[gnapse]

@all-contributors please add @Dennis273 for code

[allcontributors]

@gnapse

I've put up a pull request to add @Dennis273! 🎉

[github-actions]

🎉 This PR is included in version 5.16.3 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀

[gnapse]

@all-contributors please add @Dennis273 for code

[allcontributors]

@gnapse

I've put up a pull request to add @Dennis273! 🎉