docs(tutorial): Explicitly set Java lang for create plugin command

[OS-pedrogustavobilro]

1-liner PR.

With create-capacitor-plugin version 0.21.0, users can now specify android-lang argument to decide whether to use Java or Kotlin for the programming language for their plugin on Android.

Since the tutorial in the docs is Java-based, this PR updates the command to explicitly set the language being used (so that users don't have to prompt it afterwards). Maybe one day the tutorial can be revamped to use Kotlin (as well as probably a myriad of other updates), but that's not gonna happen in this PR.

Only added to the current docs, because it was added after official Cap 8 support in the create plugin package, so I don't see it making much sense adding for older versions, but please correct me if I'm wrong.

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Project	Deployment	Actions	Updated (UTC)
capacitor-docs	Ready	Preview, Comment	Mar 4, 2026 6:39pm

[jcesarmobile]

so --android-lang is now mandatory? I don't love that, would have preferred to keep java as default if no param is passed.

Anyway, could be good to also add the author and directory so it doesn't prompt anything.
(would also need to remove the When prompted to provide a directory, use the default by pressing Enter. When asked for the author’s name, use your own! line).