RFR: 8172: Update to release splash

[Marcus Hirt]

Really no time to do any major rework of the splash. If anyone has ideas, I'm all eyes. ;)

-------------

Commit messages:
 - 8172: Update to release splash

Changes: https://git.openjdk.org/jmc/pull/549/files
 Webrev: https://webrevs.openjdk.org/?repo=jmc&pr=549&range=00
  Issue: https://bugs.openjdk.org/browse/JMC-8172
  Stats: 0 lines in 1 file changed: 0 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jmc/pull/549.diff
  Fetch: git fetch https://git.openjdk.org/jmc.git pull/549/head:pull/549

PR: https://git.openjdk.org/jmc/pull/549