RFR: 8337422: spelling error in jlink documentation

[Athijegannathan Sundararajan]

fixed spelling to be consistent with the rest of the man page.

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Commit messages:
 - 8337422: spelling error in jlink documentation

Changes: https://git.openjdk.org/jdk/pull/20882/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=20882&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8337422
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/20882.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20882/head:pull/20882

PR: https://git.openjdk.org/jdk/pull/20882