syncval: Fix SYNC-HAZARD naming to be consistent

Consistent with each other and VUID style.
diff --git a/layers/synchronization_validation.cpp b/layers/synchronization_validation.cpp
index e1a481b..71f80af 100644
--- a/layers/synchronization_validation.cpp
+++ b/layers/synchronization_validation.cpp
@@ -88,13 +88,13 @@
             return "SYNC-HAZARD-NONE";
             break;
         case SyncHazard::READ_AFTER_WRITE:
-            return "SYNC-HAZARD-READ_AFTER_WRITE";
+            return "SYNC-HAZARD-READ-AFTER-WRITE";
             break;
         case SyncHazard::WRITE_AFTER_READ:
-            return "SYNC-HAZARD-WRITE_AFTER_READ";
+            return "SYNC-HAZARD-WRITE-AFTER-READ";
             break;
         case SyncHazard::WRITE_AFTER_WRITE:
-            return "SYNC-HAZARD-WRITE_AFTER_WRITE";
+            return "SYNC-HAZARD-WRITE-AFTER-WRITE";
             break;
         case SyncHazard::READ_RACING_WRITE:
             return "SYNC-HAZARD-READ-RACING-WRITE";