Add missing full stop in `search_not_ready` string

feature/search/src/main/res/values/strings.xml

@@ -18,7 +18,7 @@
     <string name="search">Search</string>
     <string name="clear_search_text_content_desc">Clear search text</string>
     <string name="search_result_not_found">Sorry, there is no content found for your search \"%1$s\"</string>
-    <string name="search_not_ready">Sorry, we are still processing the search index. Please come back later</string>
+    <string name="search_not_ready">Sorry, we are still processing the search index. Please come back later.</string>
     <string name="try_another_search">Try another search or explorer </string>
     <string name="interests">Interests</string>
     <string name="to_browse_topics"> to browse topics</string>