Update metadata

MANIFEST.in

-include CODE_OF_CONDUCT.rst
-include CONTRIBUTING.rst
-include LICENCE.rst
-include manage.py
-recursive-include aleksis/core/static *
-recursive-include aleksis/core/templates *
-recursive-include aleksis/core/migrations *
-recursive-include docs *

pyproject.toml

@@ -5,11 +5,12 @@ packages = [
     { include = "aleksis" }
 ]
 readme = "README.rst"
+include = ["CODE_OF_CONDUCT.rst", "CONTRIBUTING.rst", "LICENCE.rst", "manage.py", "docs/*", "docs/**/*"]
 
 description = "AlekSIS (School Information System) — Core"
 authors = ["Dominik George <dominik.george@teckids.org>", "Julian Leucker <leuckeju@katharineum.de>", "mirabilos <thorsten.glaser@teckids.org>", "Frank Poetzsch-Heffter <p-h@katharineum.de>", "Tom Teichler <tom.teichler@teckids.org>", "Jonathan Weth <wethjo@katharineum.de>", "Hangzhi Yu <yuha@katharineum.de>"]
 license = "EUPL-1.2"
-homepage = "https://aleksis.edugit.io/"
+homepage = "https://aleksis.org/"
 repository = "https://edugit.org/AlekSIS/AlekSIS"
 documentation = "https://aleksis.edugit.io/AlekSIS/docs/html/"
 classifiers = [