docs: missing super() call in constructor

[EnThib]

PR Checklist

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• The commit message follows our guidelines: https://github.com/nestjs/docs.nestjs.com/blob/master/CONTRIBUTING.md

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Docs
• Other... Please describe:

What is the current behavior?

In the CQRS documentation, the KillDragonCommand class is shown extending the Command<{ actionId: string }> class, with a custom constructor:

export class KillDragonCommand extends Command<{ actionId: string }> {
  constructor(
    public readonly heroId: string,
    public readonly dragonId: string,
  ) {}
}

However, this constructor does not include a super() call.

This works only because the Command class from @nestjs/cqrs has no constructor. But if a developer defines their own custom Command class with a constructor, TypeScript will throw error TS2377:

Constructors for derived classes must contain a 'super' call.

This can lead to confusion.

Issue Number: N/A

What is the new behavior?

To improve clarity and prevent confusion, I suggest:

Adding a super() call in the constructor of the example.

Does this PR introduce a breaking change?

• Yes
• No

Other information

[kamilmysliwiec]

LGTM