[css-round-display-1] Define shape-inside with animation type (#8424)

Author: cdoublev

css-round-display-1/Overview.bs

@@ -345,7 +345,7 @@ spec:css2; type:type; text:<uri>
     Initial: auto
     Inherited: no
     Computed value: computed lengths for <<basic-shape>>, the absolute URI for <<uri>>, otherwise as specified
-    Animatable: as defined for <<basic-shape>>, otherwise discrete
+    Animation Type: as defined for <<basic-shape>>, otherwise discrete
 </pre>
 
 The example below shows how the 'shape-inside' property works when it is set to '<code>display</code>'.