[DOCS] Run npm update --save in docs-overrides

[jbampton]

Did you read the Contributor Guide?

• Yes, I have read the Contributor Rules and Contributor Development Guide

Is this PR related to a ticket?

• No:
  • this is a documentation update. The PR name follows the format [DOCS] my subject

What changes were proposed in this PR?

refs #3072

Note that by default npm update will not update the semver values of direct dependencies in your project package.json, if you want to also update values in package.json you can run: npm update --save (or add the save=true option to a configuration file to make that the default behavior).

https://docs.npmjs.com/cli/v8/commands/npm-update

How was this patch tested?

• prek run -a
• make docsbuild

Did this PR include necessary documentation updates?

• No, this PR does not affect any public API so no need to change the documentation.