Update CHANGELOG.md

CHANGELOG.md

@@ -73,7 +73,8 @@ BUG FIXES:
   * provider/aws: Fix policy encoding issue with SNS Topics [GH-3700]
   * provider/aws: Correctly export ARN in `aws_iam_saml_provider` [GH-3827]
   * provider/aws: Fix crash in Route53 Record if Zone not found [GH-3945]
-  * providers/aws: Fix typo in error checking for IAM Policy Attachments #3970
+  * providers/aws: Fix typo in error checking for IAM Policy Attachments [GH-3970]
+  * provider/aws: Fix issue with LB Cookie Stickiness and empty expiration period [GH-3908]
   * provider/aws: Tolerate ElastiCache clusters being deleted outside Terraform [GH-3767]
   * provider/aws: Downcase Route 53 record names in statefile to match API output [GH-3574]
   * provider/aws: Fix issue that could occur if no ECS Cluster was found for a give name [GH-3829]