Mention that the A.js snippet has version history available on GitHub (#4072)

* Update 02-simple-install.md

* Update src/getting-started/02-simple-install.md

Co-authored-by: markzegarelli <mark.zegarelli@segment.com>

* Update src/getting-started/02-simple-install.md

Co-authored-by: markzegarelli <mark.zegarelli@segment.com>

Author: sarahrudy

src/getting-started/02-simple-install.md

@@ -76,6 +76,9 @@ That snippet loads Analytics.js onto the page _asynchronously_, so it won't affe
 > note ""
 > **Note:** If you only want the most basic Google Analytics setup you can stop reading right now. You're done! Just toggle on Google Analytics from the Segment App.
 
+> info ""
+> The Segment snippet version history available on [GitHub](https://github.com/segmentio/snippet/blob/master/History.md){:target="_blank"}. Segment recommends that you use the latest snippet version whenever possible.
+
 <br>
 ### Step 2: Identify Users
 <br>