blog: fix caption formatting

Updates golang/go#38532

Change-Id: Iace87c755b7a7fbc64f0223e092f6e7f8eca06d4
Reviewed-on: https://go-review.googlesource.com/c/website/+/349849
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>
Trust: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Russ Cox <rsc@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
diff --git a/_content/blog/gophergala.md b/_content/blog/gophergala.md
index 4cd8e1c..abe7574 100644
--- a/_content/blog/gophergala.md
+++ b/_content/blog/gophergala.md
@@ -2,18 +2,17 @@
 title: The Gopher Gala is the first worldwide Go hackathon
 date: 2015-01-07
 by:
-- Francesc Campoy
+  - Francesc Campoy
 summary: The Gopher Gala, the first global Go hackathon, will take place January 23-25, 2015.
 ---
 
-
 The [Gopher Gala](http://gophergala.com/) is the first Go hackathon at a
 global scale and will take place from January 23rd through the 25th. The event
 is organized by the community, supported by the Go team, and sponsored by
 Google among others.
 
 {{image "gophergala/fancygopher.jpg" 300}}
-_Fancy_Gopher,_by_ [[http://www.reneefrench.com/][_Renée_French_]]
+_Fancy Gopher, by_ [_Renée French_](http://www.reneefrench.com/)
 
 You can read about the rules of the hackathon
 [here](http://gophergala.com/rules/), but if you know about