RFR: 8338015: Fix "Java Java" typo in package info file of java.lang.classfile

[Joe Darcy]

Easy fix of an accidentally repeated "Java".

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Commit messages:
 - JDK-8338015: Fix "Java Java" typo in package info file of java.lang.classfile

Changes: https://git.openjdk.org/jdk/pull/20505/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=20505&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8338015
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/20505.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20505/head:pull/20505

PR: https://git.openjdk.org/jdk/pull/20505