Add necessary bits to install and enable copilot.

No need to send users down the rabbit hole of how many legacy ways to install vim plugins... Simply direct them to use the new builtin nvim plugin support.

content/copilot/getting-started-with-github-copilot/getting-started-with-github-copilot-in-neovim.md

@@ -47,6 +47,8 @@ To use {% data variables.product.prodname_copilot %} in Neovim you must have Neo
       ```
       git clone https://github.com/github/copilot.vim \
       ~/.config/PATH/TO/YOUR/NEOVIM/CONFIG/FILE/copilot.vim
+      ```
+
 1. To configure {% data variables.product.prodname_copilot %}, open Neovim and enter the following command.
 
    ```
@@ -59,17 +61,23 @@ To use {% data variables.product.prodname_copilot %} in Neovim you must have Neo
 {% linux %}
 
 {% data reusables.copilot.install-copilot-in-neovim %}
-    - To install the {% data variables.product.prodname_copilot %} plugin directly, you must know where Neovim stores plugins. To install the plugin, enter the following command in Git Bash.
+    - To install the {% data variables.product.prodname_copilot %} plugin with the builtin Neovim plugin manager, enter the following shell commands to clone the {% data variables.product.prodname_copilot %} release.
 
       ```
-      git clone https://github.com/github/copilot.vim \
-      ~/.config/PATH/TO/YOUR/NEOVIM/CONFIG/FILE/copilot.vim
+      mkdir -p .config/nvim/pack/github/start
+      git clone https://github.com/github/copilot.vim.git \
+             ~/.config/nvim/pack/github/start/copilot.vim
       ```
+1. Visit https://github.com/settings/copilot and complete the required steps.
 1. To configure {% data variables.product.prodname_copilot %}, open Neovim and enter the following command.
 
    ```
    :Copilot setup
    ```
+1. Enable {% data variables.product.prodname_copilot %} in your Neovim configuration, or with the Neovim command.
+   ```
+   :Copilot enable
+   ```
 {% endlinux %}
 
 ## Learning to use {% data variables.product.prodname_copilot %} in Neovim