Adjust CHANGELOG

[robinmatz]

I corrected some entries in the changelog.

To avoid these manual fixes, we should create releases for this project. Ideally before merging this PR.

To create a new release, you

• go to https://github.com/Altran-PT-GDC/Robot-Framework-Mainframe-3270-Library/releases/new

• click the "Choose a tag" dropdown and provide a new release tag, e.g. 3.0 for the most recent release
  

• Optionally, provide a title and a description for the releases

• Click the "Publish Release button" on the bottom of the page
  

• Done

[codecov-commenter]

Codecov Report

Merging #62 (64b372a) into master (f58515e) will increase coverage by 18.81%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           master      #62       +/-   ##
===========================================
+ Coverage   75.95%   94.77%   +18.81%     
===========================================
  Files           4        4               
  Lines         574      574               
  Branches      105      105               
===========================================
+ Hits          436      544      +108     
+ Misses        108       26       -82     
+ Partials       30        4       -26     

Flag	Coverage Δ
acceptance	79.26% <ø> (+3.31%)	⬆️
unit	87.80% <ø> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
Mainframe3270/__init__.py	100.00% <0.00%> (+5.71%)	⬆️
Mainframe3270/x3270.py	100.00% <0.00%> (+16.23%)	⬆️
Mainframe3270/py3270.py	88.76% <0.00%> (+23.22%)	⬆️

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