Bump sabre/dav from 4.1.3 to 4.1.4

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

diff --git a/3rdparty b/3rdparty
index 204a6cf055879d186275c11f7d847711b9eb4882..58de61cb777fe44d69373e4f6636206562a675cb 160000 (submodule)
--- a/3rdparty
+++ b/3rdparty
@@ -1 +1 @@
-Subproject commit 204a6cf055879d186275c11f7d847711b9eb4882
+Subproject commit 58de61cb777fe44d69373e4f6636206562a675cb