[notebooks] update tests to remove lang param on codeblocks

[api-clients-generation-pipeline[bot]]

See DataDog/datadog-api-spec#4158 Test branch datadog-api-spec/test/ruwani.dealwis/fix-api-test-notebooks

[datadog-datadog-prod-us1[bot]]

⚠️ Tests

⚠️ Warnings

🧪 5 Tests failed

    Create a notebook returns "OK" response from classpath:com/datadog/api/client/v1/api/notebooks.feature:Notebooks

    Create a notebook returns "OK" response from classpath:com/datadog/api/client/v1/api/notebooks.feature:Notebooks

    Create a notebook returns "OK" response from classpath:com/datadog/api/client/v1/api/notebooks.feature:Notebooks

View all

ℹ️ Info

❄️ No new flaky tests detected

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