Update plot-schema.json with changes to hoverdistance

Author: my-tien

test/plot-schema.json

@@ -2825,7 +2825,7 @@
         "valType": "boolean"
       },
       "hoverdistance": {
-        "description": "Sets the default distance (in pixels) to look for data to add hover labels (-1 means no cutoff, 0 means no looking for data). This is only a real distance for hovering on point-like objects, like scatter points. For area-like objects (bars, scatter fills, etc) hovering is on inside the area and off outside, but these objects will not supersede hover on point-like objects in case of conflict.",
+        "description": "Sets the default distance (in pixels) to look for data to add hover labels (-1 means no cutoff, 0 means no looking for data). This is only a real distance for hovering on point-like objects, like scatter points. For area-like objects (bars, scatter fills, etc) hovering is on inside the area and off outside, but these objects will not supersede hover on point-like objects in case of conflict. For hovermodes *x*, *y*, *x unified* and *y unified* on a category axis, only points that fall in the hovered category are shown in the hover label, regardless of this distance.",
         "dflt": 20,
         "editType": "none",
         "min": -1,