Upgrade AWS secrets store to beta

Signed-off-by: Elena Kolevska <elena@kolevska.com>

Author: elena-kolevska

daprdocs/data/components/secret_stores/aws.yaml

@@ -1,8 +1,8 @@
 - component: AWS Secrets Manager
   link: aws-secret-manager
-  state: Alpha
+  state: Beta
   version: v1
-  since: "1.0"
+  since: "1.15"
 - component: AWS SSM Parameter Store
   link: aws-parameter-store
   state: Alpha