tests: uart_elementary: Correct typos

Correct typos in uart_elementary test

Signed-off-by: Yannis Damigos <giannis.damigos@gmail.com>

tests/drivers/uart/uart_elementary/README.txt

@@ -3,7 +3,7 @@ that are not tested elsewhere.
 UART interrupt mode is used for the tests purpose.
 
 Hardware setup required for these tests:
-For single uart conviguration - UART0 TX connected to RX and CTS to RTS
+For single uart configuration - UART0 TX connected to RX and CTS to RTS
 For dual uart configuratiom - UART0 and UART1 TXs and RXs cross-connected
 
 These test cases cover:

tests/drivers/uart/uart_elementary/src/main.c

@@ -221,7 +221,7 @@ ZTEST(uart_elementary, test_uart_basic_transmission)
 	uart_irq_err_disable(uart_dev);
 	for (int index = 0; index < TEST_BUFFER_LEN; index++) {
 		zassert_equal(test_buffer[index], test_pattern[index],
-			      "Recieived data byte %d does not match pattern 0x%x != 0x%x", index,
+			      "Received data byte %d does not match pattern 0x%x != 0x%x", index,
 			      test_buffer[index], test_pattern[index]);
 	}
 }
@@ -295,10 +295,10 @@ ZTEST(uart_elementary, test_uart_dual_port_transmission)
 #else
 	for (int index = 0; index < TEST_BUFFER_LEN; index++) {
 		zassert_equal(test_buffer[index], test_pattern[index],
-			      "UART0 recieived data byte %d does not match pattern 0x%x != 0x%x",
+			      "UART0 received data byte %d does not match pattern 0x%x != 0x%x",
 			      index, test_buffer[index], test_pattern[index]);
 		zassert_equal(test_buffer_aux[index], test_pattern[index],
-			      "UART1 recieived data byte %d does not match pattern 0x%x != 0x%x",
+			      "UART1 received data byte %d does not match pattern 0x%x != 0x%x",
 			      index, test_buffer_aux[index], test_pattern[index]);
 	}
 #endif /* CONFIG_SETUP_MISMATCH_TEST */