Update style spec to mark that appearances and text-variable-anchor don't work together

GitOrigin-RevId: 5dda239f88cca201cf68492a853939053a405bbb

Author: sakrolek

src/style-spec/reference/v8.json

@@ -1703,7 +1703,7 @@
       "value": "appearance",
       "supported-layer-types": ["symbol"],
       "experimental": true,
-      "doc": "Conditional styling applied to symbol layer features based on dynamic conditions. If multiple conditions are true, only the first matching appearance will be applied. Only properties marked with 'Works with appearances' are supported."
+      "doc": "Conditional styling applied to symbol layer features based on dynamic conditions. If multiple conditions are true, only the first matching appearance will be applied. Only properties marked with 'Works with appearances' are supported. Known issue: at the moment having both `appearances` and `text-variable-anchor` in the same layer doesn't work correctly."
     }
   },
   "appearance": {
@@ -3993,7 +3993,7 @@
           ]
         }
       ],
-      "doc": "To increase the chance of placing high-priority labels on the map, you can provide an array of `text-anchor` locations: the renderer will attempt to place the label at each location, in order, before moving onto the next label. Use `text-justify: auto` to choose justification based on anchor position. To apply an offset, use the `text-radial-offset` or the two-dimensional `text-offset`.",
+      "doc": "To increase the chance of placing high-priority labels on the map, you can provide an array of `text-anchor` locations: the renderer will attempt to place the label at each location, in order, before moving onto the next label. Use `text-justify: auto` to choose justification based on anchor position. To apply an offset, use the `text-radial-offset` or the two-dimensional `text-offset`. Known issue: at the moment having both `appearances` and `text-variable-anchor` in the same layer doesn't work correctly.",
       "sdk-support": {
         "basic functionality": {
           "js": "0.54.0",