Update banner message (#8024)

Author: joelverhagen

src/NuGetGallery/Views/Shared/Gallery/Header.cshtml

@@ -12,7 +12,7 @@
     <div class="row">
         <div class="col-sm-12">
             <span>
-                We stand against the racism and violence the Black community is subjected to. Black Lives Matter.
+                Black Lives Matter.
             </span>
         </div>
     </div>