make the see also into a note

files/en-us/web/progressive_web_apps/guides/making_pwas_installable/index.md

@@ -21,6 +21,9 @@ We'll discuss each of these features in this guide. First, though, we'll discuss
 
 For a web app to be promoted for installation by a supporting browser, it needs to meet some technical requirements. We can consider these the minimum requirements for a web app to be a PWA.
 
+> **Note:** While not a requirement for a PWA to be installable, many PWAs use [service workers](/en-US/docs/Web/API/Service_Worker_API) to provide an offline experience.
+> See the [CycleTracker: Service workers](en-us/web/progressive_web_apps/tutorials/cycletracker/service_workers/index.md) tutorial for more information.
+
 ### The web app manifest
 
 A web app manifest is a JSON file that tells the browser how the PWA should appear and behave on the device. For a web app to be a PWA it must be installable, and for it to be installable it must include a manifest.
@@ -70,10 +73,6 @@ For a full description of every member, see the [web app manifest reference docu
 
 For a web app to be installable, it must be served in a [secure context](/en-US/docs/Web/Progressive_web_apps). This usually means that it must be served over HTTPS. Local resources, such as localhost, `127.0.0.1` and `file://` are also considered secure.
 
-### See Also
-
-While not a requirement for a PWA to be installable, many PWAs use [service workers](/en-US/docs/Web/API/Service_Worker_API) to provide an offline experience. See the [CycleTracker: Service workers](en-us/web/progressive_web_apps/tutorials/cycletracker/service_workers/index.md) tutorial for more info on doing this.
-
 ## Installation from an app store
 
 Users expect to find apps in the app store for their platform, like the Google Play Store or the Apple App Store.
@@ -151,4 +150,4 @@ You can use the [`display`](/en-US/docs/Web/Manifest/display) manifest member to
 - `"standalone"` indicates that the PWA should look and feel like a platform-specific application, with no browser UI elements
 - `"browser"` indicates that the PWA should be opened as a new browser tab or window, just like a normal website.
 
-If the browser does not support a given display mode, `display` will fall back to a supported display mode according to a predefined sequence. The [`display_override`](/en-US/docs/Web/Manifest/display_override) enables you to redefine the fallback sequence.
+If the browser does not support a given display mode, `display` will fall back to a supported display mode according to a predefined sequence. The [`display_override`](/en-US/docs/Web/Manifest/display_override) enables you to redefine the fallback sequence.