Fixed wrong close tag for snippets

Author: shepazon

swift/example_code/swift-sdk/retry/Sources/entry.swift

@@ -10,7 +10,7 @@ import Foundation
 // snippet-start:[retry.swift.imports]
 import SmithyRetries
 import SmithyRetriesAPI
-// snippet-start:[retry.swift.imports]
+// snippet-end:[retry.swift.imports]
 
 @main
 struct RetryExample {