Add example on how to update the nonce for transformations

[muradsater]

Description

Extend docs for transformations update

Checklist:

• Documentation updated. Documentation is generated from docstrings - these must be updated according to your change.

[codecov]

Codecov Report

Merging #1517 (4abb31a) into master (30090f9) will decrease coverage by 0.03%.
The diff coverage is n/a.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1517      +/-   ##
==========================================
- Coverage   91.80%   91.78%   -0.03%     
==========================================
  Files         120      120              
  Lines       15587    15587              
==========================================
- Hits        14310    14306       -4     
- Misses       1277     1281       +4     

Files	Coverage Δ
cognite/client/_api/transformations/__init__.py	76.66% <ø> (ø)

... and 2 files with indirect coverage changes

[haakonvt]

I wonder if this should accept a created session as well, would make the example much easier and more intuitive. Wdyt?

Also, please add some indentation to make it easier to read 🙏

[haakonvt]

Can't be done because the CreatedSession does not store a reference to the CogniteClient, so we don't know what project to pass.