Fixing DigitalOcean documentation urls

Fixed inserting %5C into links to digitalocean resources.

website/source/docs/builders/digitalocean.html.markdown

@@ -40,17 +40,17 @@ builder.
 
 -   `image` (string) - The name (or slug) of the base image to use. This is the
     image that will be used to launch a new droplet and provision it. See
-    https://developers.digitalocean.com/documentation/v2/\#list-all-images for
+    [https://developers.digitalocean.com/documentation/v2/\#list-all-images](https://developers.digitalocean.com/documentation/v2/#list-all-images) for
     details on how to get a list of the the accepted image names/slugs.
 
 -   `region` (string) - The name (or slug) of the region to launch the
     droplet in. Consequently, this is the region where the snapshot will
     be available. See
-    https://developers.digitalocean.com/documentation/v2/\#list-all-regions for
+    [https://developers.digitalocean.com/documentation/v2/\#list-all-regions](https://developers.digitalocean.com/documentation/v2/#list-all-regions) for
     the accepted region names/slugs.
 
 -   `size` (string) - The name (or slug) of the droplet size to use. See
-    https://developers.digitalocean.com/documentation/v2/\#list-all-sizes for
+    [https://developers.digitalocean.com/documentation/v2/\#list-all-sizes](https://developers.digitalocean.com/documentation/v2/#list-all-sizes) for
     the accepted size names/slugs.
 
 ### Optional: