Finish renaming BiscuIT-ng to AlekSIS in this äpp

README.rst

-AlekSIS School Information System (SIS) - App FiBu (financial accounting)
+AlekSIS (School Information System) - App FiBu (financial accounting)
 ======================================================================
 
 AlekSIS

pyproject.toml

 [tool.poetry]
-name = "BiscuIT-App-FiBu"
+name = "AlekSIS-App-FiBu"
 version = "1.0a4dev0"
 packages = [
     { include = "aleksis" }
 ]
 readme = "README.rst"
 
-description = "AlekSIS School Information System (SIS) - App FiBu (financial accounting)"
+description = "AlekSIS (School Information System) - App FiBu (financial accounting)"
 authors = ["Frank Poetzsch-Heffter <p-h@katharineum.de>", "Jonathan Weth <wethjo@katharineum.de>"]
 license = "EUPL-1.2"
 homepage = "https://aleksis.edugit.io/"
-repository = "https://edugit.org/BiscuIT/BiscuIT-App-FiBu"
+repository = "https://edugit.org/AlekSIS/AlekSIS-App-FiBu"
 documentation = "https://aleksis.edugit.io/AlekSIS/docs/html/"
 classifiers = [
     "Environment :: Web Environment",