RFR: 8296335 : Fix accessibility manual test instruction

[lawrence.andrews]

Fixed test instruction that helps the manual tester to perform actions

@shurymury

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Commit messages:
 - 8296335 : Fix accessibility manual test instruction

Changes: https://git.openjdk.org/jdk/pull/10996/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=10996&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8296335
  Stats: 8 lines in 5 files changed: 0 ins; 2 del; 6 mod
  Patch: https://git.openjdk.org/jdk/pull/10996.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10996/head:pull/10996

PR: https://git.openjdk.org/jdk/pull/10996