chore: update the backend-plugin-api changeset

Signed-off-by: benjdlambert <ben@blam.sh>

.changeset/wet-bars-report.md

@@ -2,4 +2,30 @@
 '@backstage/backend-plugin-api': minor
 ---
 
-Added `coreServices.actionsRegistry` and `coreServices.actions` to allow registration of distributed actions from plugins, and the ability to invoke these actions
+Added `actionsRegistry` and `actions` experimental services to `/alpha` to allow registration of distributed actions from plugins, and the ability to invoke these actions. You can use these services by including them like the following:
+
+```ts
+import {
+  actionsRegistryServiceRef,
+  actionsServiceRef,
+} from '@backstage/backend-plugin-api/alpha';
+
+createBackendPlugin({
+  pluginId: 'test-plugin',
+  register({ registerInit }) {
+    registerInit({
+      deps: {
+        actions: actionsServiceRef,
+        actionsRegistry: actionsRegistryServiceRef,
+      },
+      async init({ actions, actionsRegistry }) {
+        actionsRegistry.register({
+          ...,
+        });
+
+        await actions.invoke(...);
+      },
+    });
+  },
+});
+```