Fix dead link and typo

Fix web link to adding-icons doc which have moved.
Fix paths in adding-icons to assets which have moved.
Fix typo in authenticator

docs/docs/auth/features/index.md

@@ -12,7 +12,7 @@ This page outlines the key features available in Ente Auth.
 Ente Auth supports the icon pack provided by
 [simple-icons](https://github.com/simple-icons/simple-icons). If an icon you
 need is missing, please refer to the
-[docs/adding-icons](https://github.com/ente-io/ente/blob/main/auth/docs/adding-icons.md)
+[docs/adding-icons](https://github.com/ente-io/ente/blob/main/mobile/apps/auth/docs/adding-icons.md)
 guide for instructions on how to contribute.
 
 ### Search
@@ -136,4 +136,4 @@ Easily add or share entries using QR codes:
   right-click (desktop) a code and select "QR". This allows you to easily share
   the complete entry (including the secret) with others by letting them scan the
   displayed QR code. This can also be used to easily add the same entry to
-  another authenticatior app or service.
+  another authenticator app or service.

mobile/apps/auth/docs/adding-icons.md

@@ -4,8 +4,8 @@ Ente Auth supports the icon pack provided by
 [simple-icons](https://github.com/simple-icons/simple-icons).
 
 If you would like to add your own custom icon, please open a pull-request with
-the relevant SVG placed within `assets/custom-icons/icons` and add the
-corresponding entry within `assets/custom-icons/_data/custom-icons.json`.
+the relevant SVG placed within `mobile/apps/auth/assets/custom-icons/icons` and add the
+corresponding entry within `mobile/apps/auth/assets/custom-icons/_data/custom-icons.json`.
 
 Please be careful to upload small and optimized icon files. If your icon file 
 is over 50KB, it is likely not optimized.