Add utm to GitHub URL

Author: christin

src/pages/github-student-developer-pack.tsx

@@ -69,7 +69,7 @@ const GithubStudentPackPage: React.SFC<{}> = () => (
 
             <Offers
                 title="GitHub Student Offer"
-                para={<p>With the <a href="https://education.github.com/pack" target="_blank" rel="noopener">GitHub Student Developer Pack</a>, you get the same features as with our usual plans but at a much better price.
+                para={<p>With the <a href="https://education.github.com/pack/?utm_source=github+gitpod" target="_blank" rel="noopener">GitHub Student Developer Pack</a>, you get the same features as with our usual plans but at a much better price.
                     <br />
                     We’re happy to be able to empower student developers participating in it.</p>}
                 offers={offers}

src/pages/github-teacher-toolbox.tsx

@@ -73,7 +73,7 @@ const GithubTeacherToolBoxPage: React.SFC<{}> = () => (
             <Offers
                 title="GitHub Teacher Toolbox"
                 para={
-                    <p>With the <a href="https://education.github.com/teachers" target="_blank">GitHub Teacher Toolbox</a>, you get the same free plan as your students with the <a href="https://education.github.com/students" target="blank">GitHub Student Developer Pack</a>.
+                    <p>With the <a href="https://education.github.com/toolbox/?utm_source=github+gitpod" target="_blank">GitHub Teacher Toolbox</a>, you get the same free plan as your students with the <a href="https://education.github.com/pack/?utm_source=github+gitpod" target="blank">GitHub Student Developer Pack</a>.
                         <br />
                         We’re happy to support educators teaching frictionless coding.</p>
                 }