Unescaped HTML references in xref docs

[kirill-grouchnikov]

See https://kordamp.org/ikonli/api-xref/org/kordamp/ikonli/swing/FontIcon.html#L63:

FontIcontIcon.html#FontIcon">FontIcon icon = new FontIcon();

[aalmiray]

That's a strange artifact from JXR. Will have a look.

[aalmiray]

Problem persists in 12.0.0. FWIW both Swing and JavaFX xref have issues

https://kordamp.org/ikonli/api-xref/org/kordamp/ikonli/swing/FontIcon.html#L58

https://kordamp.org/ikonli/api-xref/org/kordamp/ikonli/javafx/FontIcon.html#L274