i18n: Translate aria-label (#396)

Author: jpmckinney

pydata_sphinx_theme/_templates/sidebar-nav-bs.html

@@ -1,4 +1,4 @@
-<nav class="bd-links" id="bd-docs-nav" aria-label="Main navigation">
+<nav class="bd-links" id="bd-docs-nav" aria-label="{{ _('Main navigation') }}">
   <div class="bd-toc-item active">
     {{ generate_nav_html("sidebar",
                          maxdepth=theme_navigation_depth|int,

pydata_sphinx_theme/docs-navbar.html

@@ -6,7 +6,7 @@
     {% endfor %}
   </div>
 
-  <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbar-collapsible" aria-controls="navbar-collapsible" aria-expanded="false" aria-label="Toggle navigation">
+  <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbar-collapsible" aria-controls="navbar-collapsible" aria-expanded="false" aria-label="{{ _('Toggle navigation') }}">
     <span class="navbar-toggler-icon"></span>
   </button>