update unit test error message

Author: stefanprobst

tests/lib/rules/no-unknown-property.js

@@ -473,7 +473,7 @@ ruleTester.run('no-unknown-property', rule, {
           data: {
             name: 'fill',
             tagName: 'div',
-            allowedTags: 'altGlyph, circle, ellipse, g, line, marker, mask, path, polygon, polyline, rect, svg, text, textPath, tref, tspan, use, animate, animateColor, animateMotion, animateTransform, set',
+            allowedTags: 'altGlyph, circle, ellipse, g, line, marker, mask, path, polygon, polyline, rect, svg, symbol, text, textPath, tref, tspan, use, animate, animateColor, animateMotion, animateTransform, set',
           },
         },
       ],