Examples: Specify the raycaster recursive flag

[WestLangley]

Follow-on to #22460, which changed the default value.

In raycaster.intersectObjects(), if the recursive flag was true, I left it as-is.

(Since this is an example, I think it is best to specify the flag -- especially since there has been an API change.)

If the recursive flag was false, I left it as-is.

If the recursive flag was not specified, I set it to false, because that was the default value prior to #22460.

Thing is, I am a bit surprised at the number of false settings. Presumably, that is what was intended...

[Mugen87]

In raycaster.intersectObjects(), if the recursive flag was true, I left it as-is.

After some time, I suggest to reconsider this point and only set the flag if it is different from the default value. But as you pointed out, it makes sense to explicitly specify the value now because of the API change.

[mrdoob]

Thanks!