ci: add changelog check

[mtrezza]

• ensures that a changelog entry has been manually added

[codecov]

Codecov Report

Merging #1112 (0da3aa1) into master (848d59b) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master    #1112   +/-   ##
=========================================
  Coverage     65.06%   65.06%           
  Complexity     2208     2208           
=========================================
  Files           122      122           
  Lines          9463     9463           
  Branches       1317     1317           
=========================================
  Hits           6157     6157           
  Misses         2799     2799           
  Partials        507      507           

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