docs: adjust example for merging sharded results with coverage (#7337)

Author: nathan-knight

docs/guide/features.md

@@ -237,9 +237,9 @@ Run tests on different machines using [`--shard`](/guide/cli#shard) and [`--repo
 All test and coverage results can be merged at the end of your CI pipeline using `--merge-reports` command:
 
 ```bash
-vitest --shard=1/2 --reporter=blob
-vitest --shard=2/2 --reporter=blob
-vitest --merge-reports --reporter=junit --coverage.reporter=text
+vitest --shard=1/2 --reporter=blob --coverage
+vitest --shard=2/2 --reporter=blob --coverage
+vitest --merge-reports --reporter=junit --coverage
 ```
 
 See [`Improving Performance | Sharding`](/guide/improving-performance#sharding) for more information.