docs: Fixed a link to example 4 in readme (#55)

Author: adityamohta

README.md

@@ -125,7 +125,7 @@ AWS CloudTrail normally publishes logs into AWS CloudWatch Logs. This module cre
 - [Complete Cloudwatch log metric filter and alarm](https://github.com/terraform-aws-modules/terraform-aws-cloudwatch/tree/master/examples/complete-log-metric-filter-and-alarm)
 - [Cloudwatch log group with log stream](https://github.com/terraform-aws-modules/terraform-aws-cloudwatch/tree/master/examples/log-group-with-log-stream)
 - [Cloudwatch metric alarms for AWS Lambda](https://github.com/terraform-aws-modules/terraform-aws-cloudwatch/tree/master/examples/lambda-metric-alarm)
-- [Cloudwatch metric alarms for AWS Lambda with multiple dimensions](https://github.com/terraform-aws-modules/terraform-aws-cloudwatch/tree/master/examples/metric-alarms-by-multiple-dimensions)
+- [Cloudwatch metric alarms for AWS Lambda with multiple dimensions](https://github.com/terraform-aws-modules/terraform-aws-cloudwatch/tree/master/examples/multiple-lambda-metric-alarm)
 - [CIS AWS Foundations Controls: Metrics + Alarms](https://github.com/terraform-aws-modules/terraform-aws-cloudwatch/tree/master/examples/cis-alarms)
 
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