fix(Input): fix styles of focused border in Teams theme

[layershifter]

Fixes #1025.

[codecov]

Codecov Report

Merging #1041 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1041   +/-   ##
=======================================
  Coverage   81.67%   81.67%           
=======================================
  Files         687      687           
  Lines        8835     8835           
  Branches     1500     1568   +68     
=======================================
  Hits         7216     7216           
  Misses       1604     1604           
  Partials       15       15

Impacted Files	Coverage Δ
...rc/themes/teams/components/Input/inputVariables.ts	100% <ø> (ø)	⬆️

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