Change the submodule URL to the HTTPS version

Author: OlivierJourdan

.gitmodules

@@ -1,3 +1,3 @@
 [submodule "course-material/examples"]
 	path = course-material/examples
-	url = git@gitlab.com:wovalab/open-source-presentations/ten-things-to-know-about-labview-events.git
+	url = https://gitlab.com/wovalab/open-source-presentations/ten-things-to-know-about-labview-events.git