Revert variables in headers and frontmatter in about-integrations.md

Author: wd006

content/integrations/concepts/about-integrations.md

@@ -1,7 +1,7 @@
 ---
 title: About GitHub integrations
 shortTitle: About integrations
-intro: 'Learn how to connect, extend, and customize {% data variables.product.github %} with apps and tools.'
+intro: 'Learn how to connect, extend, and customize GitHub with apps and tools.'
 redirect_from:
   - /get-started/exploring-integrations/about-integrations
   - /get-started/exploring-integrations/about-using-integrations