Fixed typo in string method

[nils-ohlmeier]

Description

Fixed a typo which I noticed while reading the code.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 71.20%. Comparing base (b35f8db) to head (56ab3e2).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
internal/cc/acknowledgment.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #289      +/-   ##
==========================================
+ Coverage   71.14%   71.20%   +0.06%     
==========================================
  Files          80       80              
  Lines        4477     4477              
==========================================
+ Hits         3185     3188       +3     
+ Misses       1157     1155       -2     
+ Partials      135      134       -1     

Flag	Coverage Δ
go	71.14% <0.00%> (ø)
wasm	69.22% <0.00%> (?)

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