Apply suggestion to doc/ci/environments.md

doc/ci/environments.md

@@ -606,7 +606,7 @@ In most cases, these features use the _environment specs_ mechanism, which offer
 an efficient way to talk about scoping each environment group.
 
 Let's say there are three environments: `production`, `staging`, `review/feature-1` and `review/feature-2`.
-Each environment can be matched with the following environment spec.
+Each environment can be matched with the following environment spec:
 
 | Environment Spec  | `production` | `staging` | `review/feature-1` | `review/feature-2` |
 | ----------------  | ----------   | -------   | ----------------   | ----------------   |