Remove Ruby version from WIKI

[drummer83]

Let's remove the Ruby version from the text. It changes regularly and we have the link where to find it right behind it.

[codecov]

Codecov Report

Merging #7639 (0853244) into master (2e24874) will not change coverage.
The diff coverage is n/a.

❗ Current head 0853244 differs from pull request most recent head b680697. Consider uploading reports for the commit b680697 to get more accurate results

@@           Coverage Diff           @@
##           master    #7639   +/-   ##
=======================================
  Coverage   93.22%   93.22%           
=======================================
  Files         635      635           
  Lines       18140    18140           
=======================================
  Hits        16911    16911           
  Misses       1229     1229           

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