[sealed-types] RFR: fixed comment at jvm.h

[Vicente Romero]

just fixing a comment at jvm.h

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Commit messages:
 - fixed comment at jvm.h

Changes: https://git.openjdk.java.net/amber/pull/16/files
 Webrev: https://webrevs.openjdk.java.net/amber/16/webrev.00
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/amber/pull/16.diff
  Fetch: git fetch https://git.openjdk.java.net/amber pull/16/head:pull/16

PR: https://git.openjdk.java.net/amber/pull/16