Replace tests/src with framework/src

Signed-off-by: David Horstmann <david.horstmann@arm.com>
diff --git a/tests/scripts/generate_test_cert_macros.py b/tests/scripts/generate_test_cert_macros.py
index a3bca7e..7db8fdd 100755
--- a/tests/scripts/generate_test_cert_macros.py
+++ b/tests/scripts/generate_test_cert_macros.py
@@ -1,7 +1,7 @@
 #!/usr/bin/env python3
 
 """
-Generate `tests/src/test_certs.h` which includes certficaties/keys/certificate list for testing.
+Generate `framework/src/test_certs.h` which includes certficaties/keys/certificate list for testing.
 """
 
 #