Fix: (view--add-todo-face) Bind org-done-keywords

org-get-todo-face uses org-done-keywords, which is a buffer-local
variable, so it may be nil in the context that
org-ql-view--add-todo-face is called.  See,
e.g. org-agenda-highlight-todo, which does the same thing.

Thanks to Yiming Chen (@dsdshcym).

org-ql-view.el

@@ -634,7 +634,8 @@ property."
 
 (defun org-ql-view--add-todo-face (keyword)
   "Return KEYWORD with TODO face added."
-  (when-let ((face (org-get-todo-face keyword)))
+  (when-let* ((org-done-keywords org-done-keywords-for-agenda)
+              (face (org-get-todo-face keyword)))
     (org-add-props keyword nil 'face face)))
 
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