Change 'sector' word to 'service population'

Author: maebeale

app/views/taggings/matrix.html.erb

@@ -6,7 +6,7 @@
         Tagging counts
       </h1>
       <p class="text-gray-600 max-w-2xl">
-        Total tagged items by sector and category
+        Total tagged items by service population and category
       </p>
     </div>
 
@@ -36,7 +36,7 @@
         <tr class="bg-gray-100">
           <td colspan="<%= Tag::TAGGABLE_MODELS.size + 1 %>"
               class="px-4 py-2 font-semibold text-gray-700">
-            Sectors
+            Service populations
           </td>
         </tr>