MLECO-2145: update models to new Vela 3.1.0 release

* updated vela version in setup resources script
* updated vela version in documentation
* updated minimum cmake version in documentation

Change-Id: Iadd1d082bb7f6124016a2804fd7a28e59bf72639
diff --git a/set_up_default_resources.py b/set_up_default_resources.py
index 418af4f..f8d7f8c 100755
--- a/set_up_default_resources.py
+++ b/set_up_default_resources.py
@@ -137,7 +137,7 @@
             call_command(command)
         os.chdir(current_file_dir)
     # 1.3 Make sure to have all the requirement
-    requirements = ["ethos-u-vela==3.0.0"]
+    requirements = ["ethos-u-vela==3.1.0"]
     command = f"{env_python} -m pip freeze"
     packages = call_command(command)
     for req in requirements: