fix: caret position when last string exists

[RainKolwa]

Fixes #28366

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[codecov]

Codecov Report

Merging #281 (1e6f435) into master (5d29b67) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #281   +/-   ##
=======================================
  Coverage   93.01%   93.01%           
=======================================
  Files           1        1           
  Lines         372      372           
  Branches      134      134           
=======================================
  Hits          346      346           
  Misses         26       26           

Impacted Files	Coverage Δ
src/InputNumber.tsx	93.01% <100.00%> (ø)

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