Update example based on codegen enhancements since M0

[kggilmer]

Issue #, if available: smithy-lang/smithy-kotlin#306

Description of changes:

• Update code to work with M1

testing done

Ran demo after changes:

SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
created table: arn:aws:dynamodb:us-east-2:406669096152:table/dynamo-movies-example
waiting for table to be ready...
waiting for table to be ready...
waiting for table to be ready...
waiting for table to be ready...
table ready
2013 film titles:
[Rush, Turn It Down, Or Else!]

Process finished with exit code 0

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