Replace curly quotes in code block

This removes the extraneous JSON syntax highlighting in the code block in https://docs.aws.amazon.com/lambda/latest/dg/configuration-vpc-endpoints.html#vpc-endpoint-policy.

Author: wesleym

doc_source/configuration-vpc-endpoints.md

@@ -97,10 +97,10 @@ You need to include both the qualified and the unqualified function ARN in the r
             "lambda:InvokeFunction"
          ],
          "Resource": [
-               "arn:aws:lambda:us-east-2:123456789012:function:my-function”,
-               "arn:aws:lambda:us-east-2:123456789012:function:my-function:*”
+               "arn:aws:lambda:us-east-2:123456789012:function:my-function",
+               "arn:aws:lambda:us-east-2:123456789012:function:my-function:*"
             ]
       }
    ]
 }
-```
+```