Update Android NDK version in export-android.md

[hminy572]

Description

This PR updates an outdated reference to the Android NDK version in the Android export documentation (toolchain/export-android.md).

The document previously stated that Godot relies on NDK version 23.2.8568313, which is outdated. It has been updated to reference the correct current version, 29.0.14206865.

Changes

• Updated NDK version string from 23.2.8568313 to 29.0.14206865 in the Android export example.

Checklist

• The change is a simple documentation typo/version fix.
• No code modifications were made.

[Bromeon]

Thank you!

This is bound to become outdated again; I wonder if we should just point to the link
https://github.com/godotengine/godot/blob/master/platform/android/java/app/config.gradle#L16
instead? Since the user anyway has to double-check the link and can't be confident in what we write, there's not much benefit in copying the version, is there? 🤔

[hminy572]

Thank you for replying! I 100% agree with you. Should I open another pr without hard-coding ndk version? Since this is my first time pr, I'm not used to pr protocol yet.

[Bromeon]

No, please don't open a new PR 🙂
You can just change your commit:

git commit --amend

And then check if everything is correct:

git log -n1
git diff HEAD~1

If yes, force-push to update this branch here:

git push --force-with-lease

[hminy572]

Thanks for the instructions! I removed version specification and made the sentence simple. Please let me know if there are any issues.

[Bromeon]

I would mention the key type, just so it's immediately clear what to look for 🙂

[Bromeon]

Suggested change

	2. The NDK version is [here](https://github.com/godotengine/godot/blob/master/platform/android/java/app/config.gradle).
	2. The NDK version is specified [here](https://github.com/godotengine/godot/blob/master/platform/android/java/app/config.gradle),
	under key `ndkVersion`.

[hminy572]

Thank you! That looks a lot better!

[hminy572]

With key type, that looks a lot better!