fix(migrate): write empty sections properly

[neilime]

No description provided.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 82.75862% with 5 lines in your changes missing coverage. Please review.
✅ Project coverage is 87.38%. Comparing base (2cfa348) to head (3877f5b).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...ctions/src/migration/abstract-migration.adapter.ts	70.00%	3 Missing ⚠️
...ackages/core/src/renderer/file-renderer.adapter.ts	84.61%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #128      +/-   ##
==========================================
- Coverage   87.40%   87.38%   -0.02%     
==========================================
  Files          73       73              
  Lines        4628     4639      +11     
  Branches     1047     1048       +1     
==========================================
+ Hits         4045     4054       +9     
- Misses        576      578       +2     
  Partials        7        7              

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