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

[Kevin Rushforth]

On Thu, 22 Oct 2020 20:36:40 GMT, Johan Vos <jvos at openjdk.org> wrote:

> releasenotes for JavaFX 15.0.1

doc-files/release-notes-15.0.1.md line 16:

> 14: [JDK-8255064](https://bugs.openjdk.java.net/browse/JDK-8255064) | Cherry pick GTK WebKit 2.28.4 changes | web          
> 15: [JDK-8255063](https://bugs.openjdk.java.net/browse/JDK-8255063) | Cherry pick GTK WebKit 2.28.3 changes | web          
> 16: [JDK-8255062](https://bugs.openjdk.java.net/browse/JDK-8255062) | Update to 610.1 version of WebKit     | web      

These are the JBS IDs of the backport records. We normally use the main bug ID everywhere. The rest looks fine.

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