[kotlin] Added path sanitization in javadoc comments

[ranger-ross]

Fixed bug introduced in #20618 (see comment)

The following will not compile in Kotlin as the trailing /* is interpreted as the start of a multiline comment. (even though its inside of a Javadoc comment)

/**
 * POST /v1/foo/*
 *
 */
fun foo(...) { ... } 

The solution is to replace /* with /<*> to avoid this parsing issue.

/**
 * POST /v1/foo/<*>
 *
 */
fun foo(...) { ... } 

cc: @maksim-kosolapov @dr4ke616 @karismann @Zomzog @andrewemery @4brunu @yutaka0m @stefankoppier @e5l

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[wing328]

thanks for the quick fix

can we add this to the github work testing kotlin samples?