Fix unset ansible_virtualization_role (#39514)

Error was:
AttributeError("'str' object has no attribute 'startwith'",)

Closes #39138

lib/ansible/module_utils/facts/virtual/linux.py

@@ -242,7 +242,7 @@ class LinuxVirtual(Virtual):
             if rc == 0:
                 # Strip out commented lines (specific dmidecode output)
                 vendor_name = ''.join([line.strip() for line in out.splitlines() if not line.startswith('#')])
-                if vendor_name.startwith('VMware'):
+                if vendor_name.startswith('VMware'):
                     virtual_facts['virtualization_type'] = 'VMware'
                     virtual_facts['virtualization_role'] = 'guest'
                     return virtual_facts