Devtool - changed 2 of the .mdx files so Docusaurus can render

[EthanBarlow]

The deploy details show a failed build. This was the error message:

3:58:35 PM: [ERROR] Docusaurus server-side rendering could not render static page with path /docs/essentials/do_dont.
3:58:35 PM: [ERROR] Docusaurus server-side rendering could not render static page with path /docs/essentials/faq.
3:58:37 PM: [success] [webpackbar] Server: Compiled with some errors in 14.85s
3:58:37 PM: Error: Document title not found for documentID essentials/side_effect
3:58:37 PM: Error: Document title not found for documentID essentials/side_effect

Just updated essentials/side_effect to essentials/side_effects in the do_dont.mdx and faq.mdx files. I think that should let it build.

[codecov]

Codecov Report

Merging #3173 (ef0cd3c) into devtool (32f3cd0) will decrease coverage by 0.03%.
The diff coverage is n/a.

❗ Current head ef0cd3c differs from pull request most recent head b21603e. Consider uploading reports for the commit b21603e to get more accurate results

Additional details and impacted files

@@             Coverage Diff             @@
##           devtool    #3173      +/-   ##
===========================================
- Coverage    95.27%   95.24%   -0.03%     
===========================================
  Files           53       53              
  Lines         2306     2252      -54     
===========================================
- Hits          2197     2145      -52     
+ Misses         109      107       -2     

see 37 files with indirect coverage changes

[rrousselGit]

This appears to have been fixed separately