RFR: 8296335 : Fix accessibility manual test instruction [v8]

[lawrence.andrews]

> Fixed test instruction that helps the manual tester to perform actions
> 
> @shurymury

lawrence.andrews has updated the pull request incrementally with one additional commit since the last revision:

  Update OptionPaneDemo.html

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Changes:
  - all: https://git.openjdk.org/jdk/pull/10996/files
  - new: https://git.openjdk.org/jdk/pull/10996/files/09c7ea93..f3bec8c2

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=10996&range=07
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=10996&range=06-07

  Stats: 1 line in 1 file changed: 0 ins; 1 del; 0 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