docs: Address two minor issues and update product nouns

[ADubhlaoich]

This commit handles two bits of feedback from the live website: a small command adjustment and the listed type for a parameter. Changes for the NGINX product naming conventions are also included in this commit for the two affected files.

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have checked that all unit tests pass after adding my changes
• I have updated necessary documentation
• I have rebased my branch onto main
• I will ensure my PR is targeting the main branch and pulling from my branch from my own fork

[codecov]

Codecov Report

Merging #3736 (7cb0e26) into main (87b8a58) will increase coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #3736      +/-   ##
==========================================
+ Coverage   52.39%   52.41%   +0.02%     
==========================================
  Files          59       59              
  Lines       16902    16902              
==========================================
+ Hits         8855     8859       +4     
+ Misses       7750     7748       -2     
+ Partials      297      295       -2     

see 1 file with indirect coverage changes

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