Update context.md

[Xordal]

Summary

Fixed sample of using context

Requirements (place an x in each [ ])

• I've read and understood the Contributing Guidelines and have done my best effort to follow them.
• I've read and agree to the Code of Conduct.

[CLAassistant]

All committers have signed the CLA.

[codecov]

Codecov Report

Merging #219 into master will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff           @@
##           master    #219   +/-   ##
======================================
  Coverage    62.5%   62.5%           
======================================
  Files           7       7           
  Lines         464     464           
  Branches      126     126           
======================================
  Hits          290     290           
  Misses        150     150           
  Partials       24      24

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[shaydewael]

Thanks for this fix @Xordal. Would you mind signing the Contributor's Agreement, and then I can merge this 🙌

[Xordal]

done