Update CONTRIBUTING.md

[5bentz]

• Typo
• TRANSLATIONS from src/src.pro moved to qtpass.pro in e8e8757
• Fix a broken link

[codecov]

Codecov Report

Merging #354 into master will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff           @@
##           master    #354   +/-   ##
======================================
  Coverage    2.92%   2.92%           
======================================
  Files          36      36           
  Lines        2698    2698           
  Branches      360     360           
======================================
  Hits           79      79           
  Misses       2618    2618           
  Partials        1       1

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[coveralls]

Coverage remained the same at 1.776% when pulling a5a8d52 on 5bentz:contrib into d3787d2 on IJHack:master.

[coveralls]

Coverage remained the same at 1.776% when pulling a5a8d52 on 5bentz:contrib into d3787d2 on IJHack:master.