Update install_requirements to not take v3

Author: Matevz Morato

examples/install_requirements.py

@@ -150,7 +150,7 @@ def hasWhitespace(string):
     # Install depthai depending on context
     if not git_context or git_branch == 'main':
         # Install latest pypi depthai release
-        depthai_install_cmd = [*pip_package_install, '-U', '--force-reinstall', 'depthai']
+        depthai_install_cmd = [*pip_package_install, '-U', '--force-reinstall', 'depthai~=2.0']
         if args.dry_run:
             prettyPrint(depthai_install_cmd)
         else: