docs: fix migration guide

[alexander-akait]

• This is a bugfix
• This is a feature
• This is a code refactor
• This is a test update
• This is a docs update
• This is a metadata update

For Bugs and Features; did you add new tests?

No need

Motivation / Use-Case

fixes #5088

Breaking Changes

No

Additional Info

No

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.92%. Comparing base (2aed762) to head (07681c7).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5089      +/-   ##
==========================================
- Coverage   90.05%   89.92%   -0.13%     
==========================================
  Files          15       15              
  Lines        1578     1578              
  Branches      601      601              
==========================================
- Hits         1421     1419       -2     
- Misses        143      145       +2     
  Partials       14       14              

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