chore: fix some minor issues in the comments (#2106)

Signed-off-by: withtimezone <with_timezone@outlook.com>

testing/integration-tests/src/full_client/client/archive_rpcs.rs

@@ -32,7 +32,7 @@ async fn fetch_finalized_blocks<T: Config>(
         .subscribe_finalized()
         .await
         .expect("issue subscribing to finalized in fetch_finalized_blocks")
-        .skip(1) // <- skip first block incase next is close to being ready already.
+        .skip(1) // <- skip first block in case next is close to being ready already.
         .take(n)
         .map(|r| r.expect("issue fetching block in fetch_finalized_blocks"))
 }