esp32c3_supermini: Switch from SRAM0 to SRAM1 for correct SRAM usage

SRAM0 is dedicated to IBUS and caching, whereas SRAM1 is assigned to
DBUS.

This change corrects an incorrect SRAM usage that previously triggered
the following assertion due to invalid heap size calculations:

Despite of invalid SRAM usage, that triggered following assertion due
to invalid heap size calucaltions:

ASSERTION FAIL [bytes / 8U <= 0x7fffU] @ .../zephyr/lib/heap/heap.c:491
        "heap size is too big"

Signed-off-by: Raphael Zimmerer <killekulla@rdrz.de>

boards/others/esp32c3_supermini/esp32c3_supermini.dts

@@ -16,7 +16,7 @@
 	compatible = "espressif,esp32c3_supermini";
 
 	chosen {
-		zephyr,sram = &sram0;
+		zephyr,sram = &sram1;
 		zephyr,console = &usb_serial;
 		zephyr,shell-uart = &usb_serial;
 		zephyr,flash = &flash0;