Release process recent changes

[olegbespalov]

What?

Document changes in a release process.

Why?

It's essential to keep the checklist of the release activities up to date.

Checklist

• I have performed a self-review of my code.
• I have added tests for my changes.
• I have run linter locally (make lint) and all checks pass.
• I have run tests locally (make tests) and all tests pass.
• I have commented on my code, particularly in hard-to-understand areas.

Related PR(s)/Issue(s)

[codecov-commenter]

Codecov Report

Attention: 15 lines in your changes are missing coverage. Please review.

Comparison is base (e603a49) 73.20% compared to head (501327f) 73.19%.
Report is 26 commits behind head on master.

❗ Current head 501327f differs from pull request most recent head ef2c91f. Consider uploading reports for the commit ef2c91f to get more accurate results

Files	Patch %	Lines
output/csv/output.go	65.00%	4 Missing and 3 partials ⚠️
js/modules/k6/crypto/crypto.go	86.66%	1 Missing and 1 partial ⚠️
output/cloud/output.go	0.00%	1 Missing and 1 partial ⚠️
api/server.go	50.00%	1 Missing ⚠️
js/compiler/compiler.go	66.66%	1 Missing ⚠️
lib/testutils/minirunner/minirunner.go	0.00%	1 Missing ⚠️
output/cloud/v1/data.go	66.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3473      +/-   ##
==========================================
- Coverage   73.20%   73.19%   -0.01%     
==========================================
  Files         267      267              
  Lines       20083    20076       -7     
==========================================
- Hits        14701    14695       -6     
+ Misses       4468     4465       -3     
- Partials      914      916       +2     

Flag	Coverage Δ
ubuntu	73.14% <76.92%> (-0.02%)	⬇️
windows	73.04% <76.92%> (-0.02%)	⬇️

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