chore: Send Booleans as `true` or `false` to API (#673)

Sending `1` and `0` is working, but the validator is complaining about
that.
Lets align with the JS client. [JS client uses `false`,
`true`](https://github.com/apify/apify-client-js/blob/v2.22.2/src/utils.ts)
[OpenAPI spec does not
define](https://spec.openapis.org/oas/v3.2.0.html#boolean-query-parameter-examples)
serialization of Booleans, but tools frequently choose `false/true`

### Issues:

Related to: https://github.com/apify/apify-docs/issues/2286