Updated documentation and metadata and fixed leftovers from .NET6 · aws-samples/serverless-test-samples@69ba2ad

The following actions uses Node.js version which is deprecated and will be forced to run on node20: actions/checkout@v3, actions/setup-dotnet@v3. For more info: https://github.blog/changelog/2024-03-07-github-actions-all-actions-will-run-on-node20-instead-of-node16-by-default/

Possible null reference return.

Possible null reference return.

Possible null reference return.

Non-nullable property 'Base' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

Non-nullable property 'Date' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

Non-nullable property 'Rates' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

Possible null reference return.

Possible null reference return.

Possible null reference return.

Non-nullable property 'Base' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

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