core: save stackmax by tmin_ms

src/core.py

@@ -223,7 +223,7 @@ def scan(
                 return
         
         tr_stackmax.chop(wmin, wmax)
-        io.save([tr_stackmax], 'stackmax/trace_%(tmin)s.mseed')
+        io.save([tr_stackmax], 'stackmax/trace_%(tmin_ms)s.mseed')
 
 
 __all__ = [