Rename Prettier+ to Prettier⁺ (#17364)

I renamed the extension to Prettier⁺ – because it just looks better 😎.

Sorry for the fuzz.

website/data/editors.yml

@@ -12,7 +12,7 @@
   name: Nova
   content: |
     [`Prettier`](https://extensions.panic.com/extensions/alexanderweiss/alexanderweiss.prettier/)
-    [`Prettier+`](https://extensions.panic.com/extensions/stonerl/stonerl.prettier/)
+    [`Prettier⁺`](https://extensions.panic.com/extensions/stonerl/stonerl.prettier/)
 - image: /images/editors/editor_sublime.svg
   name: Sublime Text
   content: |