RFR: 8293040: Argfile documentation for java launcher tool is confusing regarding usage of wildcards

[Christian Stein]

Please review this improvement to the manual page covering the usage of wildcards in `java`'s argfiles.

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Commit messages:
 - 8293040: Argfile documentation for java launcher tool is confusing regarding usage of wildcards

Changes: https://git.openjdk.org/jdk/pull/22208/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=22208&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8293040
  Stats: 3 lines in 1 file changed: 2 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/22208.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22208/head:pull/22208

PR: https://git.openjdk.org/jdk/pull/22208