[8.6] Fix typo (#144302) (#147159)

# Backport

This will backport the following commits from `main` to `8.6`:
 - [Fix typo (#144302)](#144302)

<!--- Backport version: 8.9.7 -->

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

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BACKPORT-->

Co-authored-by: Shan Mahanama <[email protected]>

docs/apm/apm-spaces.asciidoc

@@ -56,7 +56,7 @@ aliases for each service environment:
 
 [options="header"]
 |====
-| Index setting    | `production` env         | `staging` evn
+| Index setting    | `production` env         | `staging` env
 | Error            | `production-logs-apm`    | `staging-logs-apm`
 | Span/Transaction | `production-traces-apm`  | `staging-traces-apm`
 | Metrics          | `production-metrics-apm` | `staging-metrics-apm`