docs: fix ParserError in code block

[guckool]

Description

A backtick is misplaced in the code block, which will lead to a ParserError. The backtick is removed now.

Tests

No test is required as the change is only in the document

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 64.29%. Comparing base (1495f6d) to head (bd75ae4). Report is 561 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #12433      +/-   ##
===========================================
- Coverage    64.48%   64.29%   -0.19%     
===========================================
  Files           52       52              
  Lines         4361     4361              
===========================================
- Hits          2812     2804       -8     
- Misses        1373     1382       +9     
+ Partials       176      175       -1     

Flag	Coverage Δ
cannon-go-tests	64.29% <ø> (-0.19%)	:arrow_down:

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see 1 file with indirect coverage changes

[blmalone]

Closing. This has been opened for a while with merge conflicts.