fix: Update exception type for scheme call

doc/changelog.d/4518.fixed.md

@@ -0,0 +1 @@
+Update exception type for scheme call

src/ansys/fluent/core/fluent_connection.py

@@ -303,7 +303,6 @@ def product_build_info(self) -> str:
 
     def get_cortex_connection_properties(self):
         """Get connection properties of Fluent."""
-        from grpc._channel import _InactiveRpcError
 
         try:
             logger.info(self.product_build_info)
@@ -315,7 +314,7 @@ def get_cortex_connection_properties(self):
             cortex_pid = cortex_info.process_id
             cortex_pwd = cortex_info.working_directory
             logger.debug("Cortex connection properties successfully obtained.")
-        except _InactiveRpcError:
+        except RuntimeError:  # GrpcErrorInterceptor raises RuntimeError on failure
             logger.warning(
                 "Fluent Cortex properties unobtainable. 'force exit()' and other "
                 "methods are not going to work properly. Proceeding..."