Fix documentation typo to path.repo for UNC path example

Closes #13008

docs/reference/modules/snapshots.asciidoc

@@ -81,7 +81,7 @@ a prefix and back slashes are properly escaped:
 
 [source,yaml]
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-repo.path: ["\\\\MY_SERVER\\Snapshots"]
+path.repo: ["\\\\MY_SERVER\\Snapshots"]
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 After all nodes are restarted, the following command can be used to register the shared file system repository with