Updated System Requirements (markdown)

System-Requirements.md

@@ -1,6 +1,6 @@
 The main requirement is Gravity Sync requires at least two separate Pi-hole 5.x instances. These Pi-hole instances should be already be deployed and verified to be functional, prior to the installation of Gravity Sync.
 
-- Only the Linux distributions that Pi-hole is [certified to run on](https://docs.pi-hole.net/main/prerequesites/#supported-operating-systems) are officially supported. ([More Here](https://github.com/vmstan/gravity-sync/wiki/Frequent-Questions#do-you-support-dietpi-unraid-lxd-something-else))
+- Only the Linux distributions using systemd that Pi-hole is [certified to run on](https://docs.pi-hole.net/main/prerequesites/#supported-operating-systems) are officially supported. ([More Here](https://github.com/vmstan/gravity-sync/wiki/Frequent-Questions#do-you-support-dietpi-unraid-lxd-something-else))
 - You will need a user account with operating system level administrator privileges at each side. This can be a dedicated account with `sudo` ability, or the system's `root` account. 
 - If you're not using the `root` account, you can only install Gravity Sync in the user's `$HOME` directory.
 - If you're not using the `root` account, make sure that the account is a member of either the `sudo` or `wheel` group on both the primary and secondary Pi-hole. Most of the pre-built images available for the Raspberry Pi already have this configured, as does Ubuntu. 
@@ -36,7 +36,6 @@ The installer will perform checks to make sure the required components to use Gr
 
 - OpenSSH
 - Rsync
-- Crontab
 - Git
 - Sudo
 - SQLite3
@@ -52,13 +51,13 @@ apt update && apt install sqlite3 sudo git rsync ssh
 ### Redhat Based (CentOS, Fedora)
 
 ```
-dnf install sqlite3 sudo git cronie rsync ssh
+dnf install sqlite3 sudo git rsync ssh
 ```
 
 ### Photon OS
 
 ```
-tdnf install sqlite3 sudo git cronie rsync ssh
+tdnf install sqlite3 sudo git rsync ssh
 ```
 
 ## Pi-hole Architecture