fix typos in some consensus rules

[conradoplg]

Motivation

This is small typo fix which can be important for people searching for the consensus rule by a part of its text (a.k.a. me some hours ago)

Specifications

Original text of the rule for reference:

Complex Code or Requirements

Solution

Review

This is super low priority, and comment-only, so we may want to just admin-merge it

Reviewer Checklist

• Will the PR name make sense to users?
  • Does it need extra CHANGELOG info? (new features, breaking changes, large changes)
• Are the PR labels correct?
• Does the code do what the ticket and PR says?
  • Does it change concurrent code, unsafe code, or consensus rules?
• How do you know it works? Does it have tests?

Follow Up Work

[codecov]

Codecov Report

Merging #6012 (c3648a1) into main (67194c4) will decrease coverage by 0.02%.
The diff coverage is 100.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6012      +/-   ##
==========================================
- Coverage   78.01%   78.00%   -0.02%     
==========================================
  Files         312      312              
  Lines       38997    38997              
==========================================
- Hits        30425    30421       -4     
- Misses       8572     8576       +4     

[oxarbitrage]

A few jobs failing downloading protoc.

https://github.com/ZcashFoundation/zebra/actions/runs/3970485461/jobs/6806284735

I am retrying them, maybe resource was not temporally available.