Updates the Dockerfile's Swift version to match the `Package.swift`.

[zaneenders]

Updates the Dockerfile's Swift version to match the Package.swift version.

Motivation:

When running the command docker-compose -f docker/docker-compose.yaml run test, the project fails to build because of mismatched Swift versions.

Modifications:

Update the Dockerfile to Swift 5.10.

Result:

Docker test command now runs successfully.