Documenting how to change VM's params (#65429)

lib/ansible/modules/cloud/vmware/vmware_guest.py

@@ -29,7 +29,7 @@ requirements:
 - python >= 2.6
 - PyVmomi
 notes:
-    - Please make sure that the user used for vmware_guest has the correct level of privileges.
+    - Please make sure that the user used for M(vmware_guest) has the correct level of privileges.
     - For example, following is the list of minimum privileges required by users to create virtual machines.
     - "   DataStore > Allocate Space"
     - "   Virtual Machine > Configuration > Add New Disk"
@@ -38,9 +38,11 @@ notes:
     - "   Network > Assign Network"
     - "   Resource > Assign Virtual Machine to Resource Pool"
     - "Module may require additional privileges as well, which may be required for gathering facts - e.g. ESXi configurations."
-    - Tested on vSphere 5.5, 6.0, 6.5 and 6.7
+    - Tested on vSphere 5.5, 6.0, 6.5 and 6.7.
-    - Use SCSI disks instead of IDE when you want to expand online disks by specifying a SCSI controller
+    - Use SCSI disks instead of IDE when you want to expand online disks by specifying a SCSI controller.
-    - Uses SysPrep for Windows VM (depends on 'guest_id' parameter match 'win') with PyVmomi
+    - Uses SysPrep for Windows VM (depends on 'guest_id' parameter match 'win') with PyVmomi.
+    - In order to change the VM's parameters (e.g. number of CPUs), the VM must be powered off unless the hot-add
+      support is enabled and the C(state=present) must be used to apply the changes.
     - "For additional information please visit Ansible VMware community wiki - U(https://github.com/ansible/community/wiki/VMware)."
 options:
   state: