Update packaging.rst

[pradzins]

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

[codecov]

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

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update c54a9e6...9b8d2d9. Read the comment docs.