[jdk18u] RFR: 8280910: Update openjdk project in jcheck to "jdk-updates" for jdk18u

[Sergey Bylokhov]

The openjdk project in jcheck should be changed to "jdk-updates" for jdk18u

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Commit messages:
 - Initial version of the JDK-8280910

Changes: https://git.openjdk.java.net/jdk18u/pull/11/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk18u&pr=11&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8280910
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk18u/pull/11.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk18u pull/11/head:pull/11

PR: https://git.openjdk.java.net/jdk18u/pull/11