Update create-a-codespace.html

I have realised why we keep trying to use forking - it's the only option that is easily possible from the web browser only. 

RIght now unless we can test how someone can create a Codespace and then create a new GitHub repository using Codespaces (which I can't figure out right now) it risks circular logic.

Because of this I've just fudges it and said it's not possible right now.

app/views/install/codespaces/create-a-codespace.html

@@ -32,16 +32,15 @@
 
   <h2>1. Go to the prototype repository</h2>
 
-  <p>Go to the GitHub repository for the prototype you wish to use. For this guide we will be starting a new prototype, using the
+  <p>Go to the GitHub repository for the prototype you wish to use. For this guide we will be using the
     <a href="https://github.com/nhsuk/nhsuk-prototype-kit">NHS prototype kit repository</a>.
   </p>
 
-  <p>If you using an existing prototype, go to step 2.</p>
+  <h3>If you do not have a prototype repository</h3>
 
-  <p>If you are starting a new prototype, follow the [get started guide](/install) to set up a new prototype and then publish it to GitHub.</p>
-
+  <p>Is it not possible right now to install the kit in a new Github repository unless you can install software on your computer.</p>
 
-  <p>Ask your development team or technical leadership where you should store your prototype and how to get access.</p>
+  <p>You can try using Codespaces using the <a href="https://github.com/nhsuk/nhsuk-prototype-kit">NHS prototype kit repository</a>. You will not be able to save your progress.</p>
 
   <h2>2. Create a new Codespace</h2>