fix: add return_to parameter to API spec of createRecoveryLinkForIdenity

[zepatrik]

The parameter is already handled properly, it was just missing in the API spec.

as reported by @francesconi

[codecov]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (9a52ddf) 78.32% compared to head (6bab5d5) 78.29%.
Report is 1 commits behind head on master.

Files	Patch %	Lines
selfservice/strategy/link/strategy_recovery.go	0.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3711      +/-   ##
==========================================
- Coverage   78.32%   78.29%   -0.04%     
==========================================
  Files         346      346              
  Lines       23586    23586              
==========================================
- Hits        18474    18466       -8     
- Misses       3718     3725       +7     
- Partials     1394     1395       +1     

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