Add translation for archived team description

Author: Kobzol

locales/en-US/governance.ftl

@@ -12,6 +12,7 @@ governance-teams-header = Teams
 governance-wgs-header = Working Groups
 
 governance-archived-teams-header = Archived teams
+governance-archived-teams-description = Some past teams are no longer active. We call these "archived teams".
 governance-archived-teams-link = Show archived teams
 governance-archived-teams-title = Archived teams
 governance-archived-alumni-thanks = We want to thank all past members for their invaluable contributions!

templates/governance/index.html.hbs

@@ -43,7 +43,7 @@
       <h2>{{fluent "governance-archived-teams-header"}}</h2>
       <div class="highlight"></div>
     </header>
-    <div class="mb2">Some past teams are no longer active. We call these "archived teams".</div>
+    <div class="mb2">{{fluent "governance-archived-teams-description"}}</div>
 
     <a href="{{baseurl}}/governance/archived-teams.html" class="center w-100 mw6 button button-secondary">
       {{fluent "governance-archived-teams-link"}}