Fix spec for GroupCoordinatorResponse_v1

[ods]

Changes

This fix allows us to send v1 requests in admin client

Checklist

• I think the code is well written
• Unit tests for the changes exist
• Documentation reflects the changes
• Add a new news fragment into the CHANGES folder
  • name it <issue_id>.<type> (e.g. 588.bugfix)
  • if you don't have an issue_id change it to the pr id after creating the PR
  • ensure type is one of the following:
    • .feature: Signifying a new feature.
    • .bugfix: Signifying a bug fix.
    • .doc: Signifying a documentation improvement.
    • .removal: Signifying a deprecation or removal of public API.
    • .misc: A ticket has been closed, but it is not of interest to users.
  • Make sure to use full sentences with correct case and punctuation, for example: Fix issue with non-ascii contents in doctest text files.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (8f7bff0) 95.06% compared to head (9998338) 95.07%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #961      +/-   ##
==========================================
+ Coverage   95.06%   95.07%   +0.01%     
==========================================
  Files         106      106              
  Lines       16323    16323              
  Branches     2610     2610              
==========================================
+ Hits        15517    15519       +2     
+ Misses        531      530       -1     
+ Partials      275      274       -1     

Flag	Coverage Δ
cext	91.75% <100.00%> (+0.02%)	⬆️
integration	94.71% <100.00%> (+<0.01%)	⬆️
purepy	94.56% <100.00%> (+0.01%)	⬆️
unit	44.85% <66.66%> (+0.01%)	⬆️

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