Update config doc to correct exclude pattern key
Update config doc to correct exclude pattern key

Configuration documentation included 'exclude_path' when code references an 'exclude_pattern'. Updated to reflect the value as determined by the extension configuration loader.
AaronCritchley/two-factor-bundle,AaronCritchley/two-factor-bundle,scheb/two-factor-bundle,dfridrich/two-factor-bundle,scheb/two-factor-bundle,dfridrich/two-factor-bundle