(DOCSP-45844) Fix a typo in Ops Manager TOC-v8.0-backport (603) (#604)

# Backport

This will backport the following commits from `master` to `v8.0`:
- [(DOCSP-45844) Fix a typo in Ops Manager TOC
(#603)](10gen/docs-ops-manager#603)

<!--- Backport version: 9.6.3 -->

### Questions ?
Please refer to the [Backport tool
documentation](https://github.com/sorenlouv/backport)

Author: JuliaMongo

source/tutorial/nav/advanced-deployments.txt

@@ -19,6 +19,6 @@ Advanced Configuration Options
    Deploy a Highly Available Application </tutorial/configure-application-high-availability>
    Deploy Highly Available Backups </tutorial/configure-backup-high-availability>
    Monitor Large Deployments </tutorial/monitoring-large-deployments>
-   Assign Snapshot Scores </tutorial/assign-snapshot-stores-to-data-center>
+   Assign Snapshot Stores </tutorial/assign-snapshot-stores-to-data-center>
    Pass Outgoing Traffic through HTTP Proxy </tutorial/use-with-http-proxy>