Fix documentation type (#934).

docs/how-to/deal-with-very-large-backups.md

@@ -243,7 +243,7 @@ Alternatively, set the `XDG_STATE_HOME` environment variable.
 <span class="minilink minilink-addedin">New in version 1.9.2</span>The
 `STATE_DIRECTORY` environment variable also works for this purpose. It's set
 by systemd if `StateDirectory=borgmatic` is added to borgmatic's systemd
-serivce file.
+service file.
 
 <span class="minilink minilink-addedin">Prior to version 1.9.0</span>
 borgmatic recorded check timestamps within the `~/.borgmatic` directory. At