RFR: 8336239: Fix javadoc markup in java.lang.Process

[Pavel Rappo]

Was reading Process' documentation the other day and spotted a markup typo. Please review this utmost trivial fix.

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Commit messages:
 - Initial commit

Changes: https://git.openjdk.org/jdk/pull/20133/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=20133&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8336239
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/20133.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20133/head:pull/20133

PR: https://git.openjdk.org/jdk/pull/20133