Update next.md

ci/release/changelogs/next.md

@@ -1,6 +1,39 @@
+This release improves on the features introduced in 0.4, with `class` keyword now accepting multiple class values with an array, and grid diagrams becoming faster and more robust. 
+
+Multiple classes example:
+
+<img src="https://user-images.githubusercontent.com/3120367/235749202-aa85830e-8f4a-4a2c-be16-599302919122.svg" style="width: 600px" />
+
+```d2
+classes: {
+  base: {
+    style: {
+      stroke-dash: 2
+      border-radius: 5
+      font: mono
+      text-transform: uppercase
+    }
+  }
+  error: {
+    style.fill: "#e07d7d"
+    style.stroke: "#a60c0c"
+    style.font-color: white
+  }
+  success: {
+    style.fill: "#86f499"
+    style.stroke: "#017f07"
+    style.font-color: black
+  }
+}
+
+server-1.class: [base; error]
+server-2.class: [base; success]
+
+```
+
 #### Features 🚀
 
-- `class` field now accepts arrays. See [docs](TODO). [#1256](https://github.com/terrastruct/d2/pull/1256)
+- `class` field now accepts arrays. See [docs](https://d2lang.com/tour/classes/#multiple-classes). [#1256](https://github.com/terrastruct/d2/pull/1256)
 - Pill shape is implemented with rectangles of large border radius. Thanks @Poivey ! [#1006](https://github.com/terrastruct/d2/pull/1006)
 
 #### Improvements 🧹