Linear search fix.

[andrelopesmds]

Make it consistent with the description:

"It sequentially checks each element of the list for the target value until a match is found or until all the elements have been searched."

[codecov]

Codecov Report

Merging #504 into master will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master      #504   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          149       149           
  Lines         2612      2611    -1     
  Branches       434       434           
=========================================
- Hits          2612      2611    -1     

Impacted Files	Coverage Δ
...rc/algorithms/search/linear-search/linearSearch.js	100.00% <100.00%> (ø)

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