fix: press the Enter button and an empty tag may appear

[beichensky]

fixed the problem of generating empty tags by pressing Enter when nothing was entered.

Link issue: <Select /> in tags mode renders empty tag after pressing enter

Solution: If the content is empty, return directly.

[vercel]

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🔍 Inspect: https://vercel.com/react-component/select/6g8sYpbvUq7Nm14pPcGVDoUnEsuA
✅ Preview: https://select-git-fork-beichensky-fix-empty-tag-react-component.vercel.app

[codecov]

Codecov Report

Merging #610 (4f763e2) into master (ff723eb) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #610   +/-   ##
=======================================
  Coverage   99.17%   99.17%           
=======================================
  Files          20       20           
  Lines         972      974    +2     
  Branches      326      327    +1     
=======================================
+ Hits          964      966    +2     
  Misses          7        7           
  Partials        1        1           

Impacted Files	Coverage Δ
src/generate.tsx	99.68% <100.00%> (+<0.01%)	⬆️

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