Correct submodule urls

.gitmodules

@@ -1,6 +1,6 @@
 [submodule "lilypond-common-includes"]
 	path = lilypond-common-includes
-	url = https://git.zahlenlabyrinth.de/Notenbund/lilypond-common-includes
+	url = ssh://git@git.zahlenlabyrinth.de:9922/Notenbund/lilypond-common-includes.git
 [submodule "lilypond-song-includes"]
 	path = lilypond-song-includes
-	url = ../lilypond-song-includes.git
+	url = ssh://git@git.zahlenlabyrinth.de:9922/Notenbund/lilypond-song-includes.git