BugFix. Incorrect warning of LONG_NUMERICAL_VALUES_SEPARATED.

[Animeshz]

When number of length exactly maxNumberLength is presented the warning was issued.

Fixes the above issue and also updated available-rules.md which was corresponding to old (outdated) settings for this rule.

[petertrr]

Thanks for the contribution, @Animeshz! Your change looks reasonable for me, but please fix failing CI builds.

[codecov]

Codecov Report

Merging #660 (b4c5ba0) into master (731b86d) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##             master     #660   +/-   ##
=========================================
  Coverage     79.24%   79.24%           
  Complexity     1803     1803           
=========================================
  Files            87       87           
  Lines          4708     4708           
  Branches       1513     1513           
=========================================
  Hits           3731     3731           
  Misses          280      280           
  Partials        697      697           

Flag	Coverage Δ	Complexity Δ
unittests	79.24% <100.00%> (ø)	0.00 <0.00> (ø)

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Impacted Files	Coverage Δ	Complexity Δ
.../ruleset/rules/LongNumericalValuesSeparatedRule.kt	89.70% <100.00%> (ø)	24.00 <0.00> (ø)

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