[lworld] RFR: 8376827: [lworld] fix typo in ProblemListing for JDK-8376815

[Daniel D. Daugherty]

A trivial fix to fix typo in ProblemListing for JDK-8376815.

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Commit messages:
 - 8376827: [lworld] fix typo in ProblemListing for JDK-8376815

Changes: https://git.openjdk.org/valhalla/pull/2005/files
  Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=2005&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8376827
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/valhalla/pull/2005.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/2005/head:pull/2005

PR: https://git.openjdk.org/valhalla/pull/2005