samples: boards: espressif: update board reference

As esp32s3_devkitm does not provide SPIRAM, change test
to use esp32s3_devkitc instead.

Signed-off-by: Sylvio Alves <[email protected]>

Author: sylvioalves

samples/boards/espressif/spiram_test/README.rst

@@ -27,7 +27,7 @@ Make sure you have your board connected over USB port.
 
 .. code-block:: console
 
-   west build -b esp32s3_devkitm/esp32s3/procpu samples/boards/espressif/spiram_test
+   west build -b esp32s3_devkitc/esp32s3/procpu samples/boards/espressif/spiram_test
    west flash
 
 If using another supported Espressif board, replace the argument in the above

tests/boards/espressif/cache_coex/README.rst

@@ -16,7 +16,7 @@ Supported Boards
 ****************
 - esp32_devkitc
 - esp32s2_saola
-- esp32s3_devkitm
+- esp32s3_devkitc
 
 Building and Running
 ********************

tests/boards/espressif/cache_coex/testcase.yaml

@@ -3,7 +3,7 @@ tests:
     platform_allow:
       - esp32_devkitc/esp32/procpu
       - esp32s2_saola
-      - esp32s3_devkitm/esp32s3/procpu
+      - esp32s3_devkitc/esp32s3/procpu
     tags:
       - spiram
       - spiflash