Fix wheel to not include non-package files

cf. AlekSIS!37 (merged)

pyproject.toml

@@ -5,7 +5,14 @@ packages = [
     { include = "aleksis" }
 ]
 readme = "README.rst"
-include = ["CHANGELOG.rst", "LICENCE.rst", "docs/*", "docs/**/*", "aleksis/**/*.mo", "conftest.py", "tox.ini"]
+include = [
+    { path = "aleksis/**/*.mo", format = ["sdist", "wheel"] },
+    { path = "*.rst", format = "sdist" },
+    { path = "docs/*", format = "sdist" },
+    { path = "docs/**/*", format = "sdist" },
+    { path = "conftest.py", format = "sdist" },
+    { path = "tox.ini", format = "sdist" }
+]
 
 description = "AlekSIS (School Information System) — Core"
 authors = [