Point the project URLs at a repo that exists

The Repository key named a repo that was never created and 404'd for everyone,
which PyPI would have frozen into the version permanently. It now points at
warehack.ing/mcbebop on Gitea, which is public and anonymously reachable, with
Homepage on the docs site and an Issues link. All three verified with an
unauthenticated request.

pyproject.toml

@@ -28,8 +28,9 @@ dependencies = [
 ]
 
 [project.urls]
-Homepage = "https://warehack.ing"
-Repository = "https://git.supported.systems/rsp2k/mcbebop"
+Homepage = "https://bebop-2.warehack.ing"
+Repository = "https://git.supported.systems/warehack.ing/mcbebop"
+Issues = "https://git.supported.systems/warehack.ing/mcbebop/issues"
 
 [project.scripts]
 mcbebop = "mcbebop.server:main"