Use : instead of '' in Fn::Join

Author: hassankhan

Diff for: serverless.yml

@@ -40,12 +40,11 @@ provider:
       Resource:
         - "arn:aws:s3:::${self:provider.environment.bucket}*"
         - "Fn::Join":
-          - ""
-          - - "arn:aws:sns:"
+          - ":"
+          - - "arn:aws:sns"
             - Ref: "AWS::Region"
-            - ":"
             - Ref: "AWS::AccountId"
-            - ":${self:service}-${opt:stage}-log"
+            - "${self:service}-${opt:stage}-log"
 
 functions:
   authorizerGithub: