Fix typo/duplicate translation key in colophon (senaite#2070)

* Fix typo/duplicate translation key in colophon

* Add changelog entry

Author: winniehell

CHANGES.rst

@@ -5,6 +5,7 @@ Changelog
 2.3.0 (unreleased)
 ------------------
 
+- #2070 Fix typo/duplicate translation key in colophon
 - #2067 Replace ParentAnalysisRequest ReferenceField by UIDReferenceField
 - #2066 Fix samples w/o active analyses are displayed under "unassigned" filter
 - #2065 Fix "Create Worksheet" modal visible for samples w/o unassigned analyses

src/senaite/core/browser/viewlets/templates/colophon.pt

@@ -7,8 +7,8 @@
 
         <div class="text-center text-muted">
           <ul class="list-inline">
-            <li i18n:translate="label_powered_by">
-              <span i18n:translate="labwl_powered_by">SENAITE is powered by</span>
+            <li>
+              <span i18n:translate="label_powered_by">SENAITE is powered by</span>
               <a href="http://plone.org"
                  title="This site was built using the Plone Open Source CMS/WCM."
                  i18n:attributes="title title_built_with_plone;"