RFR: 7417: Fix incorrect identifier in result for biased locking revocation rule

[Alex Macdonald]

On Mon, 20 Sep 2021 06:40:14 GMT, mohno007 <duke at openjdk.java.net> wrote:

> This PR fixes a wrong placeholder in `BiasedLockingRevocationRule_TEXT_REVOKED_CLASSES_FOUND_LONG`.
> 
> `BiasedLockingRevocationRule.java` used `{revokedClasses}` for placeholder identifier but `messages.properties` used `{revokedTypes}`.

Marked as reviewed by aptmac (Reviewer).

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PR: https://git.openjdk.java.net/jmc/pull/309