update submodules

submodules/Makefile

@@ -1,14 +1,17 @@
 include passwords
 
 .PHONY: updateSubmodules
-updateSubmodules:
+updateSubmodules: checkoutSubmodulesDefaultBranches
+	git submodule foreach git pull
+
+.PHONY:
+checkoutSubmodulesDefaultBranches:
 	git -C lite-youtube-embed checkout master
 	git -C materialize checkout main
 	git -C parsedown checkout master
 	git -C spyc checkout master
 	git -C zopfli checkout master
 
-	git submodule foreach git pull
 
 .PHONY: buildMaterialize
 buildMaterialize: updateSubmodules