✏️ fix version annotation for primary color method in role.py

Author: Paillat-dev

discord/role.py

@@ -464,7 +464,7 @@ def color(self) -> Colour:
         """Returns the role's primary color. Equivalent to :attr:`colors.primary`.
         An alias exists under ``colour``.
 
-        .. versionadded:: 2.7
+        .. versionchanged:: 2.7
         """
         return self.colours.primary