Update .gitlab-ci.yml file

.gitlab-ci.yml

@@ -24,6 +24,7 @@ stages:          # List of stages for jobs, and their order of execution
   
 variables:
   GIT_SUBMODULE_STRATEGY: recursive
+  GIT_SUBMODULE_FORCE_HTTPS: "true"
 
 compile-bootrom:
   stage: compile