fix parameter() bug

Author: chaoming0625

brainpy/__init__.py

@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 
-__version__ = "2.2.3.4"
+__version__ = "2.2.3.5"
 
 
 try:

brainpy/initialize/generic.py

@@ -75,7 +75,7 @@ def parameter(
   else:
     raise ValueError(f'Unknown param type {type(param)}: {param}')
   if allow_scalar:
-    if param.shape == () or param.shape != (1,):
+    if param.shape == () or param.shape == (1,):
       return param
   if param.shape != size:
     raise ValueError(f'The shape of the parameters should be {size}, but we got {param.shape}')