[jfx17u] RFR: 8375975: Change JavaFX release version to 17.0.19 in jfx17u

[Johan Vos]

Increase javafx version in .jcheck/conf and build.properties

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Commit messages:
 - Increase JavaFX version to 17.0.19

Changes: https://git.openjdk.org/jfx17u/pull/246/files
  Webrev: https://webrevs.openjdk.org/?repo=jfx17u&pr=246&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8375975
  Stats: 2 lines in 2 files changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jfx17u/pull/246.diff
  Fetch: git fetch https://git.openjdk.org/jfx17u.git pull/246/head:pull/246

PR: https://git.openjdk.org/jfx17u/pull/246