patch 8.2.3254: win_gettype() does not recognize a quickfix window

Problem:    win_gettype() does not recognize a quickfix window.
Solution:   Add "quickfix" and "loclist". (Yegappan Lakshmanan, closes #8676)
diff --git a/runtime/doc/eval.txt b/runtime/doc/eval.txt
index 5054904..5f047e6 100644
--- a/runtime/doc/eval.txt
+++ b/runtime/doc/eval.txt
@@ -11661,10 +11661,12 @@
 		Return the type of the window:
 			"autocmd"	autocommand window. Temporary window
 					used to execute autocommands.
-			"popup"		popup window |popup|
-			"preview"	preview window |preview-window|
 			"command"	command-line window |cmdwin|
 			(empty)		normal window
+			"loclist"	|location-list-window|
+			"popup"		popup window |popup|
+			"preview"	preview window |preview-window|
+			"quickfix"	|quickfix-window|
 			"unknown"	window {nr} not found
 
 		When {nr} is omitted return the type of the current window.