upgrade version of amplify to v5

[katieklein]

Issue #, if available: Stepping the learn site up to aws-amplify v5

Description of changes:

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[jacoblogan]

Not sure if this staging site is up to date https://amplify-upgrade.dm6i4p3zktlna.amplifyapp.com/ but it looks like we might be losing some styling or theming with the upgrade

[ghost]

No courses found!!