[error-boundaries] Redirect isn't working by itself.

Since `componentDidUpdate` won't be called for the 1st render, if any error happens in the first render, it won't get redirection automatically. This is mentioned in the course itself here `https://frontendmasters.com/courses/complete-react-v6/redirect-on-error/` @-0:47 seconds.

I can create a PR for a fix (here and in the other repo) in a couple of days once this issue is acknowledged/approved.
Let me know.

Start with the error-boundary flow around componentDidUpdate and review the linked course segment on redirecting after an error. Reproduce an error during the first render; the work is done when that case redirects automatically, with the corresponding fix also considered for the other repository mentioned.

Written by the indexing model from the issue text.