fix utilities.sh downloading correct branhces

.gitmodules

 [submodule "backend-submodule"]
 	path = backend
 	url = ../backend
+	branch = main
 [submodule "frontend"]
 	path = frontend
 	url = ../frontend
+	branch = master

utilities.sh

 #!/usr/bin/env bash
 git submodule init
-git submodule foreach git pull origin main
+git submodule update --remote
 
 mkdir -p docs/tech
 cp ./backend/definitions/README.md ./docs/tech/architecture/definitions.md
 cp ./backend/CHANGELOG.md ./docs/tech/CHANGELOG.md
-cp ./backend/README.md ./docs/tech/installation/back-README.md
+cp ./backend/INSTALATION.md ./docs/tech/installation/back-README.md
 cp ./frontend/README.md ./docs/tech/installation/front-README.md
 cp ./backend/openapi.yml ./docs/tech/api/openapi.yml