Adjust comments about SEED synchronisation

Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
diff --git a/tests/scripts/all.sh b/tests/scripts/all.sh
index 00bf997..a22f7b9 100755
--- a/tests/scripts/all.sh
+++ b/tests/scripts/all.sh
@@ -123,7 +123,11 @@
     KEEP_GOING=0
 
     # Seed value used with the --release-test option.
-    # !!! Keep this in sync with SEED in basic-build-test.sh !!!
+    #
+    # See also RELEASE_SEED in basic-build-test.sh. Debugging is easier if
+    # both values are kept in sync. If you change the value here because it
+    # breaks some tests, you'll definitely want to change it in
+    # basic-build-test.sh as well.
     RELEASE_SEED=1
 
     : ${MBEDTLS_TEST_OUTCOME_FILE=}