fix jumpTo menu order in tutorial pages.

[shibomb]

ideas for #567

This is an improvement idea that we tried in the Japanese version.
https://p5js-ja.pages.dev/tutorials/setting-up-your-environment/

However, this implementation may not be the best due to my lack of study:.

• I am changing constants to variables.
• TypeScript type safety is not observed.

You may want to consider another better implementation.

I hope this helps you.

[davepagurek]

Good catch, thanks!