docs: generate correct doc links to master github branch

The latest docs should link to the master examples on github.
Only the docs were renamed to latest, but not the github branch.

Signed-off-by: Travis Nielsen <tnielsen@redhat.com>

Documentation/branch.liquid

@@ -3,5 +3,5 @@
 {% if currentVersion != 'latest' %}
 {% assign branchName = currentVersion | replace: 'v', '' | prepend: 'release-' %}
 {% else %}
-{% assign branchName = currentVersion %}
+{% assign branchName = 'master' %}
 {% endif %}