Update aws-smithy-http-server version to use latest aws-smithy-json (#4014)

`aws-smithy-http-server` depends on an older version of
`aws-smithy-json`, which causes an error in the generated SDK.

This PR bumps the minor version to pick up the new `aws-smithy-json`
version.

Co-authored-by: Fahad Zubair <fahadzub@amazon.com>