update to include DSA join link in title

Author: cmahns

_config.yml

@@ -16,7 +16,7 @@ plugins:
 navbar_links:
   -
     link: https://act.dsausa.org/donate/membership/
-    text: join_DSA
+    text: join_dsa
   -
     icon: <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" width="16" height="16"><path d="M3 17a4 4 0 0 1 4 4H3v-4zm0-7c6.075 0 11 4.925 11 11h-2a9 9 0 0 0-9-9v-2zm0-7c9.941 0 18 8.059 18 18h-2c0-8.837-7.163-16-16-16V3z" fill="currentColor"/></svg>
     link: /global/atom.xml

_data/locales/en.yml

@@ -14,7 +14,7 @@ postedat: $author posted at $time
 postedinat: $author posted in $language at $time
 showmore: Show More
 showless: Show Less
-add_your_blog: Add your blog
+join_dsa: Join DSA
 atom_feed: Atom Feed
 rss_feed: RSS 2.0 Feed