RFR: 8332331: Shenandoah: Change jcheck configuration for fix version to match project repo

[William Kemper]

Per https://bugs.openjdk.org/browse/SKARA-2262, we need to configure the correct fixVersion in .jcheck/conf in this repo for the bot to interact properly with JBS.

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Commit messages:
 - Change jcheck configuration for fix version to match project repo

Changes: https://git.openjdk.org/shenandoah-jdk21u/pull/44/files
  Webrev: https://webrevs.openjdk.org/?repo=shenandoah-jdk21u&pr=44&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8332331
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/shenandoah-jdk21u/pull/44.diff
  Fetch: git fetch https://git.openjdk.org/shenandoah-jdk21u.git pull/44/head:pull/44

PR: https://git.openjdk.org/shenandoah-jdk21u/pull/44