Add note about attribute name format used in examples

[cicnavi]

Fixes #265

@CzNorbi would this suffice?

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 53.29%. Comparing base (73e54d5) to head (670a135).

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #266      +/-   ##
============================================
+ Coverage     52.85%   53.29%   +0.43%     
  Complexity      984      984              
============================================
  Files           109      109              
  Lines          3585     3807     +222     
============================================
+ Hits           1895     2029     +134     
- Misses         1690     1778      +88     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[CzNorbi]

Yes. Thanks!