Update bullseye submodule and cloning to https

Notes:
* This is because GitLab has removed support for the insecure 'git://'
  protocol

Author: Aaron Covrig

.gitmodules

@@ -1,6 +1,6 @@
 [submodule "cmake"]
 	path = cmake
-	url = git://github.com/dlech/vala-cmake-modules
+	url = https://github.com/dlech/vala-cmake-modules
 [submodule "doc/sphinx/_html_extra"]
 	path = doc/sphinx/_html_extra
 	url = https://github.com/ev3dev/ev3devKit.git

README.md

@@ -20,7 +20,7 @@ This is currently in the development stages and is unstable.
 
 This project uses git and git submodules.
 
-    git clone --recursive git://github.com/ev3dev/ev3devKit
+    git clone --recursive https://github.com/ev3dev/ev3devKit
 
 
 ## Cross-compiling for the EV3