doc: boards: renesas: update board image name with the board name

- Watchdog Timer

- 49 Input/Output pins

.. figure:: ek_ra2a1.webp

	:align: center

	:alt: RA2A1 Evaluation Kit

	EK-RA2A1 Board Functional Area Definitions (Credit: Renesas Electronics Corporation)

Hardware

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Detail Hardware feature for the RA2A1 MCU group can be found at `RA2A1 Group User's Manual Hardware`_

.. figure:: ra2a1_block_diagram.webp

	:width: 442px

	:align: center

	:alt: RA2A1 MCU group feature

	RA2A1 Block diagram (Credit: Renesas Electronics Corporation)

Detail Hardware feature for the EK-RA2A1 MCU can be found at `EK-RA2A1 - User's Manual`_

EK-RA2A1 has following features.

- Native pin access through 4x 40-pin male headers

You can build and flash an application with onboard J-Link debug adapter.

:ref:`build_an_application` and

:ref:`application_run` for more details).

:ref:`application_run` for more details.

Here is an example for building and flashing the :zephyr:code-sample:`blinky` application.

.. EK-RA2A1 Web site:

   https://www.renesas.com/us/en/products/microcontrollers-microprocessors/ra-cortex-m-mcus/ek-ra2a1-evaluation-kit-ra2a1-mcu-group

.. _RA2A1 Group User's Manual Hardware:

   https://www.renesas.com/en/document/mah/renesas-ra2a1-group-users-manual-hardware

.. _EK-RA2A1 - User's Manual:

   https://www.renesas.com/en/document/mah/renesas-ra2a1-group-users-manual-hardware

- CAN FD (3-pin header)

.. figure:: ek-ra4e2-board.webp

.. figure:: ek_ra4e2.webp

	:align: center

	:alt: RA4E2 Evaluation Kit

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Detail Hardware feature for the RA4E2 MCU group can be found at `RA4E2 Group User's Manual Hardware`_

.. figure:: ra4e2-block-diagram.webp

.. figure:: ra4e2_block_diagram.webp

	:width: 442px

	:align: center

	:alt: RA4E2 MCU group feature