[jdk21u-dev] RFR: 8309511: Regression test ExtraImportSemicolon.java refers to the wrong bug

[Daniel Hu]

Clean backport. Minor comment fix with wrong bug id reference.

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Commit messages:
 - Backport bcc4d36857b0907e865d0afc4447f9b0780f8101

Changes: https://git.openjdk.org/jdk21u-dev/pull/2368/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=2368&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8309511
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/2368.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/2368/head:pull/2368

PR: https://git.openjdk.org/jdk21u-dev/pull/2368