Fix migration script link

thanks @pwalter-ebi

content/sections/websites_about.html

@@ -115,7 +115,7 @@ These are the core files that power the EBI Visual Framework:
     <a href="#" class="accordion-title">Updating an existing site?</a>
     <div class="accordion-content" data-tab-content>
 {{#markdown}}
-- <a href="https://raw.githubusercontent.com/ebiwd/EBI-Style-lab/master/content/pages/websites/sample-site/migrations/testMigration.js" class="readmore">Run a migration from the EBI-Compliance theme to v1.1</a>
+- <a href="https://raw.githubusercontent.com/ebiwd/EBI-Pattern-library/gh-pages/sample-site/migrations/testMigration.js" class="readmore">Run a migration from the EBI-Compliance theme to v1.1</a>
 - <a href="https://github.com/ebiwd/EBI-Framework/issues/85" class="readmore">Updating from v1.1 to v1.2</a>
 - <a href="https://github.com/ebiwd/EBI-Framework/#details-on-upgrading" class="readmore">Updating from v1.2 to v1.3</a>
 {{/markdown}}