Update documentation/cli/08_devnode.md

Co-authored-by: Alexander Kim <alexander@aleo.org>
Signed-off-by: Roy Rotstein <112157037+Roee-87@users.noreply.github.com>

Author: Roee-87

documentation/cli/08_devnode.md

@@ -16,7 +16,7 @@ A devnode is a lightweight-node network that bypasses the consensus algorithm an
 `leo devnode` is the recommended local development tool for lightweight testing. The older [`leo devnet`](./07_devnet.md) command (which requires a full snarkOS installation and spins up a multi-validator network) remains available for more complex testing scenarios.
 :::
 
-To initialize devnode, run the following command:
+To initialize a devnode, run the following command:
 
 ```bash
 leo devnode start --private-key <PRIVATE_KEY>