Add forwardport pr screenshot and update publish release screenshot

[blink1073]

[codecov-commenter]

Codecov Report

Merging #17 (d1ff88d) into master (5b17742) will decrease coverage by 0.07%.
The diff coverage is 92.85%.

@@            Coverage Diff             @@
##           master      #17      +/-   ##
==========================================
- Coverage   89.03%   88.96%   -0.08%     
==========================================
  Files          15       15              
  Lines        1697     1704       +7     
  Branches      198      200       +2     
==========================================
+ Hits         1511     1516       +5     
  Misses        118      118              
- Partials       68       70       +2     

Impacted Files	Coverage Δ
jupyter_releaser/tests/test_cli.py	97.83% <ø> (ø)
jupyter_releaser/npm.py	83.33% <80.00%> (-0.41%)	⬇️
jupyter_releaser/lib.py	76.68% <87.50%> (-1.06%)	⬇️
jupyter_releaser/python.py	91.66% <100.00%> (+3.78%)	⬆️

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