Submodule changed to public available

.gitmodules

@@ -1,6 +1,3 @@
-[submodule "submodules/diff-gaussian-rasterization"]
-	path = submodules/diff-gaussian-rasterization
-	url = https://gitlab.inria.fr/bkerbl/diff-gaussian-rasterization.git
 [submodule "submodules/simple-knn"]
 	path = submodules/simple-knn
 	url = https://gitlab.inria.fr/bkerbl/simple-knn.git
@@ -10,3 +7,6 @@
 [submodule "SIBR_viewers_linux"]
 	path = SIBR_viewers_linux
 	url = https://gitlab.inria.fr/sibr/sibr_core.git
+[submodule "submodules/diff-gaussian-rasterization"]
+	path = submodules/diff-gaussian-rasterization
+	url = https://github.com/graphdeco-inria/diff-gaussian-rasterization