Add '#chat' to sample searches

sites/+components/communities-search.php

@@ -1,7 +1,7 @@
 <?php
 	$sample_searches_tags_reserved = ["new", "we're here"];
 	$sample_searches_plain = ["language", "Australia"];
-	$sample_searches_tags = ["official", "privacy", "android", "crypto"];
+	$sample_searches_tags = ["chat", "official", "privacy", "android", "crypto"];
 	$sample_searches_languages = [["en", "🇬🇧"], ["zh", "🇨🇳"]];
 
 	$sample_searches = [];