chore: Fixing AWSLex.podspec #624

Job	Run time
Unit Test (AWSAPIGateway)	7m 5s
Unit Test (AWSAutoScaling)	5m 22s
Unit Test (AWSCloudWatch)	6m 6s
Unit Test (AWSCognitoAuth)	3m 39s
Unit Test (AWSCognitoIdentityProvider)	4m 42s
Unit Test (AWSComprehend)	3m 49s
Unit Test (AWSConnect)	5m 38s
Unit Test (AWSConnectParticipant)	4m 0s
Unit Test (AWSCore)	8m 50s
Unit Test (AWSDynamoDB)	5m 2s
Unit Test (AWSEC2)	5m 0s
Unit Test (AWSElasticLoadBalancing)	3m 37s
Unit Test (AWSIoT)	7m 31s
Unit Test (AWSKMS)	3m 40s
Unit Test (AWSKinesis)	3m 23s
Unit Test (AWSKinesisVideo)	3m 44s
Unit Test (AWSKinesisVideoArchivedMedia)	4m 1s
Unit Test (AWSKinesisVideoSignaling)	5m 34s
Unit Test (AWSKinesisVideoWebRTCStorage)	4m 4s
Unit Test (AWSLambda)	3m 49s
Unit Test (AWSLex)	3m 51s
Unit Test (AWSLogs)	3m 47s
Unit Test (AWSMachineLearning)	2m 50s
Unit Test (AWSMobileClient)	4m 27s
Unit Test (AWSPinpoint)	4m 32s
Unit Test (AWSPolly)	4m 49s
Unit Test (AWSRekognition)	5m 1s
Unit Test (AWSS3)	6m 6s
Unit Test (AWSSES)	4m 36s
Unit Test (AWSSNS)	3m 9s
Unit Test (AWSSQS)	8m 41s
Unit Test (AWSSageMakerRuntime)	5m 47s
Unit Test (AWSSimpleDB)	4m 49s
Unit Test (AWSTextract)	4m 41s
Unit Test (AWSTranscribe)	4m 16s
Unit Test (AWSTranscribeStreaming)	4m 4s
Unit Test (AWSTranslate)	4m 26s
Unit Test (AWSLocation)	4m 57s
Unit Test (AWSChimeSDKMessaging)	3m 55s
Unit Test (AWSChimeSDKIdentity)	2m 59s
	3h 10m 19s

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