switch from SourceForge to GitLab for submodule

striezel · striezel · commit 0a50e54f6ffd · 2021-09-15T15:32:26.000+02:00
The GitLab repository seems to have better connectivity.
diff --git a/.gitmodules b/.gitmodules
@@ -1,3 +1,3 @@
 [submodule "libstriezel"]
 	path = libstriezel
-	url = git://git.code.sf.net/p/libthoro/code
+	url = https://gitlab.com/striezel/libstriezel.git
