sync description with everywhere else

pyproject.toml

@@ -6,7 +6,7 @@ packages = [
 ]
 readme = "README.rst"
 
-description = "AlekSIS (School Information System) - App for Untis import"
+description = "AlekSIS (School Information System) — App for Untis import"
 authors = ["Dominik George <dominik.george@teckids.org>", "Julian Leucker <leuckeju@katharineum.de>", "Frank Poetzsch-Heffter <p-h@katharineum.de>", "Jonathan Weth <wethjo@katharineum.de>"]
 license = "EUPL-1.2"
 homepage = "https://aleksis.edugit.io/"