[bug] Fix exception handling for missing braintaichi module in dependency check (#746)

* Fix exception handling for missing braintaichi module in dependency check

* Update dependency_check.py

Author: Routhleck

brainpy/_src/dependency_check.py

@@ -52,9 +52,9 @@ def import_braintaichi(error_if_not_found=True):
         if importlib.util.find_spec('braintaichi') is not None:
             try:
                 import braintaichi as braintaichi
-            except ModuleNotFoundError:
+            except ModuleNotFoundError as e:
                 if error_if_not_found:
-                    raise_braintaichi_not_found()
+                    raise e
                 else:
                     braintaichi = None
         else: