SpecDB: Fix hardtanh spec

Summary: titled

Reviewed By: zonglinpeng

Differential Revision: D72406135

fbshipit-source-id: b2f7433a0eb60941572ad6b77d66a8037a412e08

Author: manuelcandales

facto/specdb/db.py

@@ -2128,7 +2128,7 @@
                         lambda deps, dtype: fn.dtype_strict_lower_bound(deps[0].dtype)
                     ),
                     cp.Value.Lt(
-                        lambda deps, dtype: fn.dtype_strict_lower_bound(deps[0].dtype)
+                        lambda deps, dtype: fn.dtype_strict_upper_bound(deps[0].dtype)
                     ),
                 ],
             ),