docs: replace deprecated datatype.uuid() with string.uuid()

[saranatour1]

No description provided.

[ST-DDT]

https://github.com/faker-js/faker/blob/next/docs/guide/usage.md also has a few references to the old method.
Would you like to change them in this PR as well?

[codecov]

Codecov Report

Merging #2214 (51d3af1) into next (631f732) will increase coverage by 0.00%.
The diff coverage is n/a.

Additional details and impacted files

@@           Coverage Diff           @@
##             next    #2214   +/-   ##
=======================================
  Coverage   99.59%   99.60%           
=======================================
  Files        2607     2607           
  Lines      245002   245002           
  Branches     1152     1155    +3     
=======================================
+ Hits       244017   244031   +14     
+ Misses        958      944   -14     
  Partials       27       27           

see 1 file with indirect coverage changes

[saranatour1]

I did that but while I was reading, I noticed that this method has been marked as deprecated as well :
Link , and It was used in the same docs,
please let me know if I need to close this PR or just submit another one.
Thanks!
@ST-DDT

[ST-DDT]

Link , and It was used in the same docs,
please let me know if I need to close this PR or just submit another one.

helpers.unique is only soft deprecated and there isn't a replacement yet, so there is no need to replace it yet.

[saranatour1]

Do I submit another PR?

[xDivisionByZerox]

Sorry, I don't understand. Why do you want to open another PR exactly? 🤔

[saranatour1]

They Mentioned that there were other changes in another document, I changed them and this is why I am asking.

[xDivisionByZerox]

Ah gotcha. @ST-DDT changed the PR title so it better reflects all changes done in the PR.
So to conclude: The changes are similar enough that they can be reviewed/merged in the same PR.

Thank you for your contribution ❤️