docs(go): solve typo in DeleteStream method.

[chengxilo]

Fixes a typo found during the code review for #2964. I create this separate PR since this change is out of scope for the original one

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 71.98%. Comparing base (0102b50) to head (5d02029).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #2972   +/-   ##
=========================================
  Coverage     71.98%   71.98%           
  Complexity      925      925           
=========================================
  Files          1113     1113           
  Lines         92345    92345           
  Branches      69896    69896           
=========================================
  Hits          66473    66473           
  Misses        23314    23314           
  Partials       2558     2558           

Flag	Coverage Δ
go	36.38% <ø> (ø)

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