RFR: 8352302: Test sun/security/tools/jarsigner/TimestampCheck.java is failing

[Weijun Wang]

A certificate created in the test will expire on 2026-03-20. This change adds another 2000 days to it.

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Commit messages:
 - the fix

Changes: https://git.openjdk.org/jdk/pull/24107/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=24107&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8352302
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/24107.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24107/head:pull/24107

PR: https://git.openjdk.org/jdk/pull/24107