Update README.md

[nextglabs]

Issue that this pull request solves

The online_tracker doesn't work when language is set to French for example. This is because the online keyword that wplay is expecting, is changed to en ligne in French. Other languages might also affect the result which would always be stuck offline if the main language isn't English.

Proposed changes

Added more details on how to make the online tracker work (by setting up Whatsapp's language to English)

Types of changes

Put an x in the boxes that apply

• [ ] Bugfix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [x] Documentation update (Documentation content changed)
• [ ] Other (please describe):

Checklist

Put an x in the boxes that apply

• [ ] My code follows the style guidelines of this project
• [ ] I have performed a self-review of my own code
• [ ] I have commented my code, particularly in hard-to-understand areas
• [x] I have made corresponding changes to the documentation
• [x] My changes generate no new warnings

[codecov[bot]]

Codecov Report

Merging #387 (1d85132) into master (95e92ae) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #387   +/-   ##
=======================================
  Coverage   71.13%   71.13%           
=======================================
  Files           6        6           
  Lines         194      194           
=======================================
  Hits          138      138           
  Misses         56       56           

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[rpotter12]

@nextglabs Thanks for the contribution

[nextglabs]

My pleasure :)