RFR: 8297217: Incorrect generation name in the heap verification log message with Serial GC

[Ashutosh Mehra]

Please review this trivial patch to fix the young generation name displayed in the log message during heap verification for Serial GC.

Signed-off-by: Ashutosh Mehra <asmehra at redhat.com>

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Commit messages:
 - Fix the log message to display young gen name

Changes: https://git.openjdk.org/jdk/pull/11219/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=11219&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8297217
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/11219.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11219/head:pull/11219

PR: https://git.openjdk.org/jdk/pull/11219