updated documentation

Author: h00die-gr3y

documentation/modules/exploit/linux/http/acronis_cyber_infra_cve_2023_45249.md

@@ -57,7 +57,7 @@ This option is required and is the SSH port (default: 22) to establish a SSH ses
 This option is optional and allows the use of your own SSH private key file in PEM format.
 Generate your SSH private key with following command `ssh-keygen -t rsa -b 2048 -m PEM -f <your_priv_key>` or
 convert your existing SSH private key to PEM format with `ssh-keygen -p -N "" -m PEM -f /path/to/existing/private/key`
-If no key is provided, a private SSH key will be generated.
+If no key is provided, a SSH private key will be generated for you.
 
 ## Scenarios
 ```msf
@@ -242,4 +242,5 @@ ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCauf4JO4xGHWulsoHHOwTXztTvJ4FQz92RTicFIqqH
 ```
 
 ## Limitations
-No limitations.
+When using your own SSH private key, be aware of the fact that you can not upload the same SSH public key twice via Acronis Web Portal.
+Duplicate SSH public keys are not allowed and the exploit will fail if this occurs.