[jdk21u-dev] RFR: 8361298: SwingUtilities/bug4967768.java fails where character P is not underline

[Goetz Lindenmaier]

I backport this for parity with 21.0.10-oracle.

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Commit messages:
 - Backport 57553ca1dbc63e329116bc11764816a4c5ccb297

Changes: https://git.openjdk.org/jdk21u-dev/pull/2249/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=2249&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8361298
  Stats: 9 lines in 1 file changed: 6 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/2249.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/2249/head:pull/2249

PR: https://git.openjdk.org/jdk21u-dev/pull/2249