Update dependency org.fxmisc.richtext:richtextfx to v0.11.7

[melix]

This PR contains the following updates:

Package	Type	Update	Change
org.fxmisc.richtext:richtextfx	dependencies	patch	0.11.6 -> 0.11.7

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Release Notes

FXMisc/RichTextFX (org.fxmisc.richtext:richtextfx)

v0.11.7

Full Changelog

Implemented enhancements:

• JavaKeywordsDemo use multiPlainChanges with paragraph index #​1287

Fixed bugs:

• TextFlowExt removed clashing getCaretShape method #​1285 (Thank you Symeon94)
• Partial fix for incorrect caret position after Undo #​1295 (Thank you Symeon94)
• Fixed horizontal scrolling excessive layouts #​1296

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