[jfx15] RFR: 8255272: Create release notes for JavaFX 15.0.1 [v2]

[Johan Vos]

> releasenotes for JavaFX 15.0.1

Johan Vos has updated the pull request incrementally with one additional commit since the last revision:

  Refer to original backport issues

-------------

Changes:
  - all: https://git.openjdk.java.net/jfx/pull/335/files
  - new: https://git.openjdk.java.net/jfx/pull/335/files/2ff5e46f..d374a896

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jfx&pr=335&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jfx&pr=335&range=00-01

  Stats: 4 lines in 1 file changed: 1 ins; 0 del; 3 mod
  Patch: https://git.openjdk.java.net/jfx/pull/335.diff
  Fetch: git fetch https://git.openjdk.java.net/jfx pull/335/head:pull/335

PR: https://git.openjdk.java.net/jfx/pull/335