Update C9.yaml to address bug in error handling for C9 Instance Finder

[switch180]

Issue #, if available:

Description of changes:
Addresses the following failure with exception handling. We should not pass err object to the traceback function

[ERROR] TypeError: '>=' not supported between instances of 'IndexError' and 'int'
Traceback (most recent call last):
File "/var/task/index.py", line 53, in lambda_handler
responseData = {'Error': traceback.format_exc(err)}
File "/var/lang/lib/python3.9/traceback.py", line 167, in format_exc
return "".join(format_exception(*sys.exc_info(), limit=limit, chain=chain))
File "/var/lang/lib/python3.9/traceback.py", line 120, in format_exception
return list(TracebackException(
File "/var/lang/lib/python3.9/traceback.py", line 517, in init
self.stack = StackSummary.extract(
File "/var/lang/lib/python3.9/traceback.py", line 340, in extract
if limit >= 0:

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