blog: correct comma splice

Change-Id: I47e7b2e40e67b7eaf97b1ba3896f79d351392efe
Reviewed-on: https://go-review.googlesource.com/126815
Reviewed-by: Andrew Bonventre <andybons@golang.org>
diff --git a/content/go-cloud.article b/content/go-cloud.article
index b61b318..84206dc 100644
--- a/content/go-cloud.article
+++ b/content/go-cloud.article
@@ -96,4 +96,4 @@
 
 The project requires contributors to sign the same Contributor License Agreement as that of the Go project. Read the [[https://github.com/google/go-cloud/blob/master/CONTRIBUTING.md][contribution guidelines]] for more details. Please note, Go Cloud is covered by the Go [[https://github.com/google/go-cloud/blob/master/CODE_OF_CONDUCT.md][Code of Conduct]].
 
-Thank you for taking the time to learn about Go Cloud, we are excited to work with you to make Go the language of choice for developers building portable cloud applications.
+Thank you for taking the time to learn about Go Cloud. We are excited to work with you to make Go the language of choice for developers building portable cloud applications.