Fixing a minor typo under Selection Options (#9082)

Mulit => Multi

docs/sources/reference/templating.md

@@ -97,7 +97,7 @@ Grafana will detect this and automatically refresh a variable when one of it's c
 
 Option | Description
 ------- | --------
-*Mulit-value* | If enabled, the variable will support the selection of multiple options at the same time.
+*Multi-value* | If enabled, the variable will support the selection of multiple options at the same time.
 *Include All option* | Add a special `All` option whose value includes all options.
 *Custom all value* | By default the `All` value will include all options in combined expression. This can become very long and can have performance problems. Many times it can be better to specify a custom all value, like a wildcard regex. To make it possible to have custom regex, globs or lucene syntax in the **Custom all value** option it is never escaped so you will have to think avbout what is a valid value for your data source.