Update install.rst

Add workaround for Apple Silicon installation in doc.

website/content/install.rst

@@ -53,6 +53,18 @@ The quickest way is to install `libenchant` using `Homebrew <https://brew.sh/>`_
 
     brew update
     brew install enchant
+    
+If you are using Apple Silicon and it displays this error: 
+``The 'enchant' C library was not found and maybe needs to be installed.``, 
+as a workaround, you may need to install an x86_64 (Intel) version of `enchant`.
+In order to do so, you need to install the x86_64 version of Homebrew in 
+``/usr/local/`` and then use this version to install the corresponding 
+version of `enchant`.
+
+.. code-block:: bash
+
+    arch -x86_64 /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
+    arch -x86_64 /usr/local/bin/brew install enchant
 
 If you are using `MacPorts <https://www.macports.org/>`_ you can also
 install the `enchant2 <https://github.com/macports/macports-