RFR: 8271208: Typo in ModuleDescriptor.read javadoc

[Jaikiran Pai]

Can I please get a review of this trivial fix which fixes the typo noted in https://bugs.openjdk.java.net/browse/JDK-8271208?

Ran `make docs-image` locally and generated the new javadocs and the change looks fine.

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Commit messages:
 - 8271208: Typo in ModuleDescriptor.read javadoc

Changes: https://git.openjdk.java.net/jdk/pull/5021/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=5021&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8271208
  Stats: 3 lines in 1 file changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk/pull/5021.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/5021/head:pull/5021

PR: https://git.openjdk.java.net/jdk/pull/5021