RFR: 8264031: Fix typo in ZipFileSystem.deleteFile ZipException

[Simon Legner]

8264031: Fix typo in ZipFileSystem.deleteFile ZipException

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Commit messages:
 - ZipFileSystem: fix typo in ZipException

Changes: https://git.openjdk.java.net/jdk/pull/2588/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=2588&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8264031
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2588.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2588/head:pull/2588

PR: https://git.openjdk.java.net/jdk/pull/2588