grammar

Signed-off-by: Mattia Rizzolo <mattia@debian.org>

process/templates/process/assign_am.html

@@ -64,7 +64,7 @@ document.addEventListener("DOMContentLoaded", evt => { main(); });
           <input type="hidden" name="am" value="{{am.lookup_key}}">
           <button
           {% if am.slots == 0 %}
-            class="btn btn-sm btn-outline-secondary" data-toggle="tooltip" title="This AM has set their slots to 0"
+            class="btn btn-sm btn-outline-secondary" data-toggle="tooltip" title="This AM set their slots to 0"
           {% elif am.stats_free == 0 %}
             class="btn btn-sm btn-secondary" data-toggle="tooltip" title="This AM has no free slots"
           {% elif am.stats_free < 0 %}