simplify template (unnecessary join)

Author: tyrcho

aws/logs_monitoring/template.yaml

@@ -734,10 +734,7 @@ Resources:
                     Resource:
                       - Fn::If:
                           - CreateS3Bucket
-                          - Fn::Join:
-                              - "/"
-                              - - Fn::GetAtt: ForwarderBucket.Arn
-                                - "*"
+                          - Fn::Sub: "${ForwarderBucket.Arn}/*"
                           - Fn::Sub: "arn:aws:s3:::${DdForwarderExistingBucketName}/*"
                     Effect: Allow
                   - Ref: AWS::NoValue
@@ -1062,10 +1059,7 @@ Resources:
                 Resource:
                   - Fn::If:
                       - CreateS3Bucket
-                      - Fn::Join:
-                          - "/"
-                          - - Fn::GetAtt: "ForwarderBucket.Arn"
-                            - "*"
+                      - Fn::Sub: "${ForwarderBucket.Arn}/*"
                       - Fn::Sub: "arn:aws:s3:::${DdForwarderExistingBucketName}/*"
               - Effect: Allow
                 Action: