chore(release): remove logout step

[knqyf263]

If I understand correctly, docker/login-action@v1 log out from the Docker registry by default. Am I missing something?
https://github.com/docker/login-action#inputs

https://github.com/aquasecurity/starboard/runs/1901817059?check_suite_focus=true

[codecov]

Codecov Report

Merging #408 (8b26d75) into main (0c9cf08) will increase coverage by 0.19%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #408      +/-   ##
==========================================
+ Coverage   67.69%   67.89%   +0.19%     
==========================================
  Files          58       58              
  Lines        3105     3105              
==========================================
+ Hits         2102     2108       +6     
+ Misses        741      736       -5     
+ Partials      262      261       -1     

Impacted Files	Coverage Δ
pkg/operator/controller/vulnerabilityreport.go	62.67% <0.00%> (+2.87%)	⬆️

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[danielpacak]

If I understand correctly, docker/login-action@v1 log out from the Docker registry by default. Am I missing something?
https://github.com/docker/login-action#inputs

https://github.com/aquasecurity/starboard/runs/1901817059?check_suite_focus=true

This is correct. Logout step is redundant now. I used to run the docker login command before we refactored to use Docker's GitHub Action.