Change 'Send feedback' to 'Report bug'

Change-Id: I163d08494cd0c6e10b62d1fbb5d4f9d8bd2a21b5

polygerrit-ui/app/elements/gr-app-element.html

diff --git a/polygerrit-ui/app/elements/gr-app-element.html b/polygerrit-ui/app/elements/gr-app-element.html
index 20f5996..aff71f7 100644
--- a/polygerrit-ui/app/elements/gr-app-element.html
+++ b/polygerrit-ui/app/elements/gr-app-element.html
@@ -196,7 +196,7 @@
       <div>
         <a class="feedback"
             href$="[[_feedbackUrl]]"
-            rel="noopener" target="_blank">Send feedback</a>
+            rel="noopener" target="_blank">Report bug</a>
         | Press &ldquo;?&rdquo; for keyboard shortcuts
         <gr-endpoint-decorator name="footer-right"></gr-endpoint-decorator>
       </div>