fix typo

Co-authored-by: jheysel-r7 <[email protected]>

Author: sfewer-r7

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

@@ -3,7 +3,7 @@ This module exploits an authentication bypass vulnerability (CVE-2024-0012) and
 vulnerability (CVE-2024-9474) in the PAN-OS management web interface. An unauthenticated attacker can
 execute arbitrary code with root privileges.
 
-The following version are affected:
+The following versions are affected:
   * PAN-OS 11.2 (up to and including 11.2.4-h1)
   * PAN-OS 11.1 (up to and including 11.1.5-h1)
   * PAN-OS 11.0 (up to and including 11.0.6-h1)