docs: update to next version [BUMP BETA] (#4493)

platform/docs/versioned_docs/version-3.9/migration-guide/3p8-to-3p9/2-Renamings.md

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+---
+id: 2-renamings
+title: Renamings
+sidebar_position: 2
+---
+
+import Tabs from '@theme/Tabs';
+import TabItem from '@theme/TabItem';
+
+
+## Panel Measurements
+
+The panel in the default extension is renamed from `measure` to `panelMeasurement` to be more consistent with the rest of the extensions.
+
+**Action Needed**
+
+Update any references to the `measure` panel to `panelMeasurement` in your code.
+
+Find and replace
+
+<Tabs>
+  <TabItem value="Before" label="Before 🕰️" default>
+    @ohif/extension-default.panelModule.measure
+  </TabItem>
+  <TabItem value="After" label="After 🚀" >
+    @ohif/extension-cornerstone.panelModule.panelMeasurement
+  </TabItem>
+</Tabs>
+
+## addIcon from ui
+
+The addIcon from the ui package has had a version added in the default extension as
+`utils.addIcon` which adds to both `ui` and `ui-next`.