Update utm links in create-next-app (vercel#10442)

* Updated links

* Use default-example as the medium

* Apply suggestion

Co-authored-by: JJ Kasper <jj@jjsweb.site>

packages/create-next-app/templates/default/README.md

@@ -152,7 +152,7 @@ To configure the syntax highlighting in your favorite text editor, head to the [
 
 ## Deploy to Now
 
-[ZEIT Now](https://zeit.co/home?utm_source=create-next-app&utm_medium=referral&utm_campaign=Create%20Next%20App) offers a zero-configuration single-command deployment.
+[ZEIT Now](https://zeit.co/home?utm_source=create-next-app&utm_medium=readme&utm_campaign=create-next-app) offers a zero-configuration single-command deployment.
 
 1.  Install the `now` command-line tool either via npm `npm install -g now` or Yarn `yarn global add now`.
 
@@ -164,7 +164,7 @@ To configure the syntax highlighting in your favorite text editor, head to the [
 
     Paste that URL into your browser when the build is complete, and you will see your deployed app.
 
-You can find more details about [`ZEIT Now` here](https://zeit.co/home?utm_source=create-next-app&utm_medium=referral&utm_campaign=Create%20Next%20App).
+You can find more details about [`ZEIT Now` here](https://zeit.co/home?utm_source=create-next-app&utm_medium=readme&utm_campaign=create-next-app).
 
 ## Something Missing?
 

packages/create-next-app/templates/default/pages/index.js

@@ -37,7 +37,7 @@ const Home = () => (
         </a>
 
         <a
-          href="https://zeit.co/new?utm_source=create-next-app&utm_medium=referral&utm_campaign=Create%20Next%20App"
+          href="https://zeit.co/new?utm_source=create-next-app&utm_medium=default-template&utm_campaign=create-next-app"
           className="card"
         >
           <h3>Deploy &rarr;</h3>
@@ -50,7 +50,7 @@ const Home = () => (
 
     <footer>
       <a
-        href="https://zeit.co?utm_source=create-next-app&utm_medium=referral&utm_campaign=Create%20Next%20App"
+        href="https://zeit.co?utm_source=create-next-app&utm_medium=default-template&utm_campaign=create-next-app"
         target="_blank"
         rel="noopener noreferrer"
       >