_content/solutions: packend -> backend

CL 375798 fixed this, but was overwritten by CL 384874

Fixes golang/go#51251

Change-Id: I709861181e925c6f4046d183418c3521a876e592
Reviewed-on: https://go-review.googlesource.com/c/website/+/394816
Reviewed-by: Ian Lance Taylor <iant@google.com>
Trust: Dmitri Shuralyov <dmitshur@google.com>
diff --git a/_content/solutions/cloud.md b/_content/solutions/cloud.md
index 43acad3..4e0ce14 100644
--- a/_content/solutions/cloud.md
+++ b/_content/solutions/cloud.md
@@ -86,7 +86,7 @@
     url: https://www.dropbox.com/
     logoSrc: dropbox.svg
     logoSrcDark: dropbox.svg
-    desc: Dropbox was built on Python, but in 2013 decided to migrate their performance-critical packends to Go. Today, most of the company’s infrastructure is written in Go.
+    desc: Dropbox was built on Python, but in 2013 decided to migrate their performance-critical backends to Go. Today, most of the company’s infrastructure is written in Go.
     ctas:
       - text: Dropbox libraries
         url: https://blogs.dropbox.com/tech/2014/07/open-sourcing-our-go-libraries/