Mention changing borgmatic path in cron documentation (#455).

NEWS

@@ -1,6 +1,7 @@
 1.5.19.dev0
  * #387: Fix error when configured source directories are not present on the filesystem at the time
    of backup. Now, Borg will complain, but the backup will still continue.
+ * #455: Mention changing borgmatic path in cron documentation.
  * Update sample systemd service file with more granular read-only filesystem settings.
  * Move Gitea and GitHub hosting from a personal namespace to an organization for better
    collaboration with related projects.

docs/how-to/set-up-backups.md

@@ -258,7 +258,10 @@ sudo mv borgmatic /etc/cron.d/borgmatic
 sudo chmod +x /etc/cron.d/borgmatic
 ```
 
-You can modify the cron file if you'd like to run borgmatic more or less frequently.
+If borgmatic is installed at a different location than
+`/root/.local/bin/borgmatic`, edit the cron file with the correct path. You
+can also modify the cron file if you'd like to run borgmatic more or less
+frequently.
 
 ### systemd