Fix AWS SDK warning during build

[cesarvarela]

8:12:01 PM: error (node:4041) NOTE: We are formalizing our plans to enter AWS SDK for JavaScript (v2) into maintenance mode in 2023.
8:12:01 PM: Please migrate your code to use AWS SDK for JavaScript (v3).
8:12:01 PM: For more information, check the migration guide at https://a.co/7PzMCcy

I think this is related to the gatsby-source-s3 plugin.

[pdcp1]

There is an open issue https://github.com/JoshuaWalsh/gatsby-plugin-s3/issues/423 on the gatsby-plugin-s3 package to update the aws-sdk package to v3, and one of them said that is working on a solution.
So I think it isn't worth creating our own gatsby-plugin-s3 plugin. We can live with this warning until https://github.com/JoshuaWalsh/gatsby-plugin-s3/issues/423 is closed.

I just subscribe to that issue, so I can be notified when they upgrade the package.

[pdcp1]

There is a PR open to solve this gatsby-uc/gatsby-plugin-s3#457. As soon as this PR is merged and released we can update the package.