Update link to Library Manager submission instructions

The library submission documentation was moved from the wiki of the Arduino IDE 1.x repository to the dedicated
repository for the Arduino Library Manager registry.

There was still a redirection link at the previously referenced page, but it will be best for this link to send the
reader directly to the relevant information, as is done by this change.

Author: per1234

content/learn/01.starting-guide/04.software-libraries/libraries.md

@@ -23,7 +23,7 @@ A number of libraries come installed with the IDE, but you can also download or
 
 Once it has finished, an **Installed** tag should appear next to the Bridge library, so you can go ahead and close the library manager.
 
-Now the new library will be available in the **Sketch > Include Library** menu. If you want to add your own library to Library Manager, follow [these instructions](https://github.com/arduino/Arduino/wiki/Library-Manager-FAQ).
+Now the new library will be available in the **Sketch > Include Library** menu. If you want to add your own library to Library Manager, follow [these instructions](https://github.com/arduino/library-registry#adding-a-library-to-library-manager).
 
 ### Online IDE
 

content/software/ide-v1/tutorials/installing-libraries/installing-libraries.md

@@ -31,7 +31,7 @@ Once it has finished, an _Installed_ tag should appear next to the Bridge librar
 ![](assets/LibraryManager_3.png)
 
 You can now find the new library available in the _Sketch > Include Library_ menu.
-If you want to add your own library to Library Manager, follow [these instructions](https://github.com/arduino/Arduino/wiki/Library-Manager-FAQ).
+If you want to add your own library to Library Manager, follow [these instructions](https://github.com/arduino/library-registry#adding-a-library-to-library-manager).
 
 ## Importing a .zip Library