Correct comment.

Signed-off-by: Chen Tianjie <TJ_Chen@outlook.com>

src/heavyloadlog.h

@@ -33,7 +33,7 @@
 #define HEAVYLOAD_LOG_ENTRY_MAX_ARGC 32
 #define HEAVYLOAD_LOG_ENTRY_MAX_STRING 128
 
-/* This structure defines an entry inside the slow log list */
+/* This structure defines an entry inside the slow/fat log list */
 typedef struct heavyLoadLogEntry {
     robj **argv;
     int argc;