Updates downloaders: 67f3f58 Adds nextcloud-dl

diff --git a/downloaders b/downloaders
index 48ef3d069478dab8438db608e2cb3ce10e37c232..67f3f58b8b4c163ea0e8fc26df4a977605ff9d34 160000 (submodule)
--- a/downloaders
+++ b/downloaders
@@ -1 +1 @@
-Subproject commit 48ef3d069478dab8438db608e2cb3ce10e37c232
+Subproject commit 67f3f58b8b4c163ea0e8fc26df4a977605ff9d34