[jfx11u] Integrated: 8274413: FX: Update copyright year in docs, readme files to 2022

[Kevin Rushforth]

Clean backport.

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Commit messages:
 - 8274413: FX: Update copyright year in docs, readme files to 2022

Changes: https://git.openjdk.java.net/jfx11u/pull/56/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jfx11u&pr=56&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8274413
  Stats: 3 lines in 3 files changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.java.net/jfx11u/pull/56.diff
  Fetch: git fetch https://git.openjdk.java.net/jfx11u pull/56/head:pull/56

PR: https://git.openjdk.java.net/jfx11u/pull/56