Updates to version switcher

If `dev` is listed first within `_config_cockroachdb.yml` > versions,
its version tag will be shown as "Dev", even if it's the same as
"Stable". This commit fixes that.

_includes/version-switcher.html

@@ -17,7 +17,7 @@
             class="version--mobile version--page-dne"
           {% endif %}>
             {{ v.version.name }}
-            {% if v.version.tag %}{% unless v.version.tag == "cloud" %}({{ v.version.tag | capitalize }}){% endunless %}{% endif %}
+            {% unless v.version.tag == "cloud" or v.version.tag == nil %}({% if v.version.version == site.versions["stable"] %}Stable{% elsif v.version.version == site.versions["dev"] %}Dev{% endif %}){% endunless %}
             {% unless v.url %}
               <span class="version-text--page-dne">
                 This page does not exist in {{ v.version.version }}
@@ -33,7 +33,7 @@
             data-tooltip data-placement="left" data-container="body" title="This page does not exist in {{ v.version.version }}."
           {% endif %}>
             {{ v.version.name }}
-            {% if v.version.tag %}({{ v.version.tag | capitalize }}){% endif %}
+            {% if v.version.tag %}({% if v.version.version == site.versions["stable"] %}Stable{% elsif v.version.version == site.versions["dev"] %}Dev{% endif %})e{% endif %}
           </a>
         </li>
         {% endfor %}