docs(data): add v8 migration

projects/ngrx.io/content/guide/migration/v8.md

@@ -133,3 +133,19 @@ StoreDevtoolsModule.instrument({
   actionsBlocklist: ['...']
 })
 ```
+
+## @ngrx/data
+
+### Renames
+
+To stay consistent with the other `@ngrx/*` packages, the following has been renamed:
+
+- `NgrxDataModule` is renamed to `EntityDataModule`
+- `NgrxDataModuleWithoutEffects` is renamed to `EntityDataModuleWithoutEffects`
+- `NgrxDataModuleConfig` is renamed to `EntityDataModuleConfig`
+
+<div class="alert is-helpful">
+
+The installation of `@ngrx/data` package via `ng add @ngrx/data` will remove `angular-ngrx-data` from the `package.json` and will also perform these renames.
+
+</div>