fix: update docs

Author: twoeths

src/state_transition/utils/ref_count.zig

@@ -19,12 +19,14 @@ pub fn RefCount(comptime T: type) type {
             return ptr;
         }
 
-        /// private deinit, consumer should call release() instead
+        /// private deinit, consumer should call unref() instead
         fn deinit(self: *@This()) void {
             self.instance.deinit();
             self.allocator.destroy(self);
         }
 
+        /// caution: this returns a copy of the instance, make sure this does not have copy overhead
+        /// or use pointer type instead
         pub fn get(self: *@This()) T {
             return self.instance;
         }