shields: fix mikroe h bridge 4 click

- minor corrections in h bridge 4 click
- add references in shield documentation
- update overlay

Signed-off-by: Jilay Pandya <[email protected]>

Author: jilaypandya

boards/shields/mikroe_h_bridge_4_click/doc/index.rst

@@ -33,5 +33,13 @@ Programming
 .. zephyr-app-commands::
    :zephyr-app: samples/drivers/stepper/generic
    :board: <board>
-   :west-args: --shield mikroe_h_bridge_4_click
+   :shield: mikroe_h_bridge_4_click
    :goals: build flash
+
+References
+**********
+
+.. target-notes::
+
+.. _Mikroe H-Bridge 4 click:
+   https://www.mikroe.com/h-bridge-4-click

boards/shields/mikroe_h_bridge_4_click/mikroe_h_bridge_4_click.overlay

@@ -3,6 +3,12 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
+/ {
+	aliases {
+		stepper = &mikroe_h_bridge_4_click;
+	};
+};
+
 / {
 	mikroe_h_bridge_4_click: h_bridge_4_click {
 		status = "okay";