docs: replace zeros comments with ones

[peterpme]

Documentation describes PublicKey.default as "all zeros" when its in fact, "all ones"

[CriesofCarrots]

The original comment is arguably correct. While the base58-encoded string representation of the default PublicKey is all ones, the underlying BN number is 32 bytes that are all zeros. Would you be willing to rework your PR to make this more clear?

[peterpme]

@CriesofCarrots yeah! Thanks for the quick reply and helpful comment. What do you think?

[codecov]

Codecov Report

Merging #28372 (578e3c9) into master (e6687b8) will increase coverage by 0.1%.
The diff coverage is n/a.

@@            Coverage Diff            @@
##           master   #28372     +/-   ##
=========================================
+ Coverage    77.3%    77.5%   +0.1%     
=========================================
  Files          55       55             
  Lines        2889     2926     +37     
  Branches      402      407      +5     
=========================================
+ Hits         2234     2268     +34     
- Misses        514      517      +3     
  Partials      141      141             

[CriesofCarrots]

Thanks for the quick edit! Looks good to me.
(Disregard the commitlint CI failure. I'll fix that on merge/squash)