test: fix some descriptions

Signed-off-by: Valerio Setti <vsetti@baylibre.com>
diff --git a/tests/scripts/all.sh b/tests/scripts/all.sh
index 5631b9f..1460ecd 100755
--- a/tests/scripts/all.sh
+++ b/tests/scripts/all.sh
@@ -1964,7 +1964,7 @@
     scripts/config.py -f include/psa/crypto_config.h unset PSA_WANT_ALG_STREAM_CIPHER
     scripts/config.py -f include/psa/crypto_config.h unset PSA_WANT_ALG_ECB_NO_PADDING
 
-    # SHA384 needed for some ECDSA signature tests.
+    # These hashes are needed for some ECDSA signature tests.
     scripts/config.py -f tests/include/test/drivers/config_test_driver.h set MBEDTLS_SHA224_C
     scripts/config.py -f tests/include/test/drivers/config_test_driver.h set MBEDTLS_SHA384_C
     scripts/config.py -f tests/include/test/drivers/config_test_driver.h set MBEDTLS_SHA512_C