Docs: Update docs with typo fixes

This merge request fixes some small typos, adds information on editing an episode, and fixes Notes in the following pages:

• Fix "Notes" paragraph in episodes.mdx and the Website Overview page index.mdx
• Fix typo in Manage your instance / users.mdx: Add missing t from the word "the"
• Fix typo in Manage your instance / podcast.mdx - remove n from "ration" should be "ratio"
• Add missing @ symbol to the podcast handle examples in Website overview index.mdx
• Add paragraph explaining how to edit an episode prior to or after publishing an episode

Please let me know if I need to update anything if I did anything incorrectly.

Thanks!

docs/src/content/docs/en/user-guide/website/index.mdx

@@ -2,6 +2,8 @@
 title: Podcast Home Page
 ---
 
+import { Aside } from "@astrojs/starlight/components";
+
 The podcast home page is your landing page for your listeners to view episode
 announcements, messages, episodes, and links to where to find your podcast. If
 you have only one podcast, your users will be automatically redirected from your
@@ -20,9 +22,13 @@ if you have any new notifications, and the user who is logged in. You can click
 on the user for quick access to your account, changing your password, or to log
 out.
 
-:::note If you have multiple podcasts, you can click the user dropdown to switch
-to choose which podcast to interact with. If your account has access to two or
-more podcasts, pay attention to which podcast is broadcasting messages! :::
+<Aside>
+
+If you have multiple podcasts, you can click the user dropdown to switch to
+choose which podcast to interact with. If your account has access to two or more
+podcasts, pay attention to which podcast is broadcasting messages!
+
+</Aside>
 
 Listeners can click the `Follow` button to follow any messages, including
 episode announcements, from a Fediverse app, such as Mastodon. After clicking