Updated text

app/src/main/res/values/strings.xml

@@ -1767,7 +1767,7 @@
         Initially, the search is performed on the device.
         To search the server too, tap the \'search again\' button.
     </string>
-    <string name="title_search_hint_fts">Search via index: whole words only</string>
+    <string name="title_search_hint_fts">Using the search index: whole words only</string>
     <string name="title_search_index_hint">Searching via the search index is fast, but only finds whole words.</string>
     <string name="title_search_text_hint">Searching for text in messages, when there are a large number of messages, might not work on some servers</string>
     <string name="title_search_text_unsupported">\'%s\' means that the mail server doesn\'t support searching in message texts</string>