Update packaging.rst

[pradzins]

Just a typo corrected - rebased against projecthamster/hamster-lib develop branch.

[codecov[bot]]

Codecov Report

Merging #233 into develop will not change coverage. The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop     #233   +/-   ##
========================================
  Coverage    96.25%   96.25%           
========================================
  Files            9        9           
  Lines          934      934           
  Branches       141      141           
========================================
  Hits           899      899           
  Misses          13       13           
  Partials        22       22

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