Update to Credo 1.7.9.

[conradwt]

This PR supports the following features:

• update to Credo 1.7.9

[github-actions]

Docker image tag(s) pushed:

ghcr.io/conradwt/zero-to-graphql-using-elixir:gha-11656248025
ghcr.io/conradwt/zero-to-graphql-using-elixir:pr-243 

Labels added to images:

org.opencontainers.image.created=2024-11-04T00:56:16.352Z
org.opencontainers.image.description=The purpose of this example is to provide details as to how one would go about using GraphQL with the Elixir Language.
org.opencontainers.image.licenses=MIT
org.opencontainers.image.revision=82d33dc99d739e87cc8ab65146830e5df0c83a0f
org.opencontainers.image.source=https://github.com/conradwt/zero-to-graphql-using-elixir
org.opencontainers.image.title=zero-to-graphql-using-elixir
org.opencontainers.image.url=https://github.com/conradwt/zero-to-graphql-using-elixir
org.opencontainers.image.version=gha-11656248025