fix spell error for config.py

ppcls/utils/config.py

@@ -137,12 +137,12 @@ def override(dl, ks, v):
         if len(ks) == 1:
             # assert ks[0] in dl, ('{} is not exist in {}'.format(ks[0], dl))
             if not ks[0] in dl:
-                print('A new filed ({}) detected!'.format(ks[0], dl))
+                print('A new field ({}) detected!'.format(ks[0], dl))
             dl[ks[0]] = str2num(v)
         else:
             if ks[0] not in dl.keys():
                 dl[ks[0]] = {}
-                print("A new Series filed ({}) detected!".format(ks[0], dl))
+                print("A new Series field ({}) detected!".format(ks[0], dl))
             override(dl[ks[0]], ks[1:], v)