boards: adi: max32690evkit: Updated References index.rst

Updated the reference to the ADI Developer Portal Solution Center with
URL. The Solution Center provides more resources than the product
information. Users can still find the product information from the new
portal link.

Signed-off-by: Janel Kratky <[email protected]>

Author: jcandkk

boards/adi/max32690evkit/doc/index.rst

@@ -303,7 +303,7 @@ instead of ``west flash``.
 References
 **********
 
-- `MAX32690EVKIT web page`_
+- `MAX32690EVKIT solution center`_
 
-.. _MAX32690EVKIT web page:
-   https://www.analog.com/en/design-center/evaluation-hardware-and-software/evaluation-boards-kits/MAX32690EVKIT.html
+.. _MAX32690EVKIT solution center:
+   https://developer.analog.com/solutions/max32690