Update documentation based on code in FuelJson.kt

[aj-65]

Description

I was a little confused when my code would compile with Result but saw Result in FuelJson.kt

Check all that apply

• Bug fix (a non-breaking change which fixes an issue)
• New feature (a non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Refactoring (a change which changes the current internal or external interface)
• This change requires a documentation update

How Has This Been Tested?

In case you did not include tests describe why you and how you have verified the
changes, with instructions so we can reproduce. If you have added comprehensive
tests for your changes, you may omit this section.

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation, if necessary
• My changes generate no new compiler warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Inspect the bytecode viewer, including reasoning why

[codecov]

Codecov Report

Merging #678 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #678   +/-   ##
=========================================
  Coverage     71.32%   71.32%           
  Complexity      296      296           
=========================================
  Files            58       58           
  Lines          1496     1496           
  Branches        194      194           
=========================================
  Hits           1067     1067           
  Misses          334      334           
  Partials         95       95

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[kittinunf]

Ah, it was a typo in the documentation. Thanks for fixing it for us. 👏