Fix forge oauth columns migration

[xoxys]

Regression introduced in #5517

[codecov]

Codecov Report

❌ Patch coverage is 66.66667% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 26.41%. Comparing base (30d33e1) to head (0456e08).
⚠️ Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
...store/datastore/migration/027_fix_forge_columns.go	66.66%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5525      +/-   ##
==========================================
- Coverage   26.41%   26.41%   -0.01%     
==========================================
  Files         405      405              
  Lines       28869    28878       +9     
==========================================
+ Hits         7627     7628       +1     
- Misses      20544    20551       +7     
- Partials      698      699       +1     

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