(DOCSP-48483) Fixes typo. (#786)

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- [DOCSP-48483](https://jira.mongodb.org/browse/DOCSP-48483)
- [STAGING](paste the link to staging here)

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Author: erabil-mdb

source/tutorial/query-backup.txt

@@ -77,8 +77,8 @@ Connections to these instances are over |tls-ssl|  and require
   Requests come in through the web server, which acts as a proxy to
   the :manual:`mongod </reference/program/mongod/#mongodb-binary-bin.mongod>`.
 
-Muti-Region Backups 
-~~~~~~~~~~~~~~~~~~~
+Multi-Region Backups 
+~~~~~~~~~~~~~~~~~~~~
 
 If you :ref:`enabled multi-region backups <backup-deployment>`,
 queryable backup is disabled at the cluster-level to prevent