RFR: 8295168: Remove superfluous period in @throws tag description

[Pavel Rappo]

Please review this utmost trivial fix for an issue discovered while working on something else in jdk.javadoc. As far as I can see, this is the only case of `{@inheritDoc}` not being the sole content of a `@throws` description in JDK.

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Commit messages:
 - Initial commit

Changes: https://git.openjdk.org/jdk/pull/10664/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=10664&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8295168
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/10664.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10664/head:pull/10664

PR: https://git.openjdk.org/jdk/pull/10664