docs(tooltip): rename demo Four directions to Placement

[ghost]

rename demo Four directions to Placement
Related to #3764

[YevheniiaMazur]

Tested, looks good.
Travis check was not successfull (local check successfull), waiting for it second run. If everything will be ok, than this pr is ready for merge

[codecov]

Codecov Report

Merging #3765 into development will increase coverage by 0.02%.
The diff coverage is n/a.

@@               Coverage Diff               @@
##           development    #3765      +/-   ##
===============================================
+ Coverage        72.05%   72.07%   +0.02%     
===============================================
  Files              252      252              
  Lines             8159     8159              
  Branches          1552     1552              
===============================================
+ Hits              5879     5881       +2     
+ Misses            1858     1857       -1     
+ Partials           422      421       -1

Impacted Files	Coverage Δ
src/chronos/i18n/pl.ts	83.33% <0%> (+5.55%)	⬆️

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