links to @6 versions

Author: Fil

README.md

@@ -25,9 +25,9 @@ var piyg = d3.scaleSequential(d3.interpolatePiYG);
 If you use NPM, `npm install d3-scale-chromatic`. Otherwise, download the [latest release](https://github.com/d3/d3-scale-chromatic/releases/latest) or load directly from [d3js.org](https://d3js.org) as a [standalone library](https://d3js.org/d3-scale-chromatic.v1.min.js). AMD, CommonJS, and vanilla environments are supported. In vanilla, a `d3` global is exported:
 
 ```html
-<script src="https://d3js.org/d3-color.v1.min.js"></script>
-<script src="https://d3js.org/d3-interpolate.v1.min.js"></script>
-<script src="https://d3js.org/d3-scale-chromatic.v1.min.js"></script>
+<script src="https://d3js.org/d3-color.v2.min.js"></script>
+<script src="https://d3js.org/d3-interpolate.v2.min.js"></script>
+<script src="https://d3js.org/d3-scale-chromatic.v2.min.js"></script>
 <script>
 
 var yellow = d3.interpolateYlGn(0), // "rgb(255, 255, 229)"
@@ -40,7 +40,7 @@ var yellow = d3.interpolateYlGn(0), // "rgb(255, 255, 229)"
 Or, as part of the [D3 default bundle](https://github.com/d3/d3):
 
 ```html
-<script src="https://d3js.org/d3.v5.min.js"></script>
+<script src="https://d3js.org/d3.v6.min.js"></script>
 <script>
 
 var yellow = d3.interpolateYlGn(0), // "rgb(255, 255, 229)"