Platform: stm: b_u585i_iot02a: Add flash layout info.

Add B-U585I-IOT02A in cortex M33 list in platform_introduction.rst

Change-Id: Ic8780fe0a8437ec5e783c77b64d3ae12974b43e3
Signed-off-by: Michel Jaouen <michel.jaouen@st.com>
diff --git a/platform/ext/platform_introduction.rst b/platform/ext/platform_introduction.rst
index d134657..b895e29 100644
--- a/platform/ext/platform_introduction.rst
+++ b/platform/ext/platform_introduction.rst
@@ -30,6 +30,8 @@
           <https://developer.arm.com/tools-and-software/development-boards/fpga-prototyping-boards/mps3>`_
         - `LPC55S69.
           <https://www.nxp.com/products/processors-and-microcontrollers/arm-microcontrollers/general-purpose-mcus/lpc5500-cortex-m33/lpcxpresso55s69-development-board:LPC55S69-EVK>`_
+        - 'B-U585I-IOT02A.
+          <https://www.st.com/en/evaluation-tools/B-U585I-IOT02A.html>`_
         - `NUCLEO L552ZE Q.
           <https://www.st.com/content/st_com/en/products/evaluation-tools/product-evaluation-tools/mcu-mpu-eval-tools/stm32-mcu-mpu-eval-tools/stm32-nucleo-boards/nucleo-l552ze-q.html>`_
         - `DISCO L562QE.