RFR: 8316038: Fix doc typos in java.io.Console and java.util.Scanner

[Pavel Rappo]

Please review this trivial PR.

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Commit messages:
 - Initial commit

Changes: https://git.openjdk.org/jdk/pull/15667/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=15667&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8316038
  Stats: 7 lines in 2 files changed: 0 ins; 0 del; 7 mod
  Patch: https://git.openjdk.org/jdk/pull/15667.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15667/head:pull/15667

PR: https://git.openjdk.org/jdk/pull/15667