[jfx17u] RFR: 8274413: FX: Update copyright year in docs, readme files to 2022

[Kevin Rushforth]

Clean backport to jfx17u

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

Changes: https://git.openjdk.java.net/jfx17u/pull/16/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jfx17u&pr=16&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/jfx17u/pull/16.diff
  Fetch: git fetch https://git.openjdk.java.net/jfx17u pull/16/head:pull/16

PR: https://git.openjdk.java.net/jfx17u/pull/16