Update submodule

.gitmodules

 [submodule "themes/teckids"]
 	path = themes/teckids
-	url = https://edugit.org/Teckids/team-sysadmin/teckids-pelican
+	url = https://edugit.org/Teckids/team-pr/pelican-theme-teckids.git
 [submodule "plugins"]
 	path = plugins
 	url = https://github.com/getpelican/pelican-plugins