Refactor module name to github.com/hyperfoil/horreum-client-golang

[lampajr]

Changes proposed

Had to refactor the Go module name from github.com/hyperfoil/horreum to github.com/hyperfoil/horreum-client-golang because otherwise there would be a conflict in the repository location -> Go would try to fetch the Go module from github.com/Hyperfoil/Horreum, which is indeed the wrong repo.

Check List (Check all the applicable boxes)

• My code follows the code style of this project.
• My change requires changes to the documentation.
• I have updated the documentation accordingly.
• All new and existing tests passed.