Update outdated example in book/effects/json page to "getRandomQuote”

[jonnygoespro]

Description:

The Effects/JSON page of the Elm Guide references an old example called getRandomCatGif. This example is outdated and needs to be replaced with the newer example, getRandomQuote.

Personal Background:

• My Programming Background: I am currently pursuing a master’s degree in IT in Salzburg. I have experience with various frontend frameworks, including Vue, React, and NextJS.
• How I Found the Guide: I discovered the Elm Guide through a workshop on functional programming in a course called Applied Programming Paradigms. In this workshop, we explored Elm and its unique approach to frontend development.
• Why I want to learn this language: Elm offers an interesting approach to writing frontend code, particularly when it comes to testability and robustness.
• The Thing I Found Confusing: Encountering outdated examples like getRandomCatGif in an otherwise clear and structured guide creates uncertainty and makes it harder to follow along and apply what I’ve learned.

[jonnygoespro]

Already resolved in Pull Request #292