security: change enum to enum class in security-common.hpp

Change-Id: I5565c845cd57f3457c8120b11399a105fa83418d
Refs: #3083
diff --git a/src/security/transform/digest-filter.hpp b/src/security/transform/digest-filter.hpp
index fdd9c5b..935899f 100644
--- a/src/security/transform/digest-filter.hpp
+++ b/src/security/transform/digest-filter.hpp
@@ -62,7 +62,7 @@
 };
 
 unique_ptr<Transform>
-digestFilter(DigestAlgorithm algo = DIGEST_ALGORITHM_SHA256);
+digestFilter(DigestAlgorithm algo = DigestAlgorithm::SHA256);
 
 } // namespace transform
 } // namespace security