pkg update and first config fix

org-brain not working, add org-roam

lisp/org-ref/org-ref-isbn.el

@@ -140,13 +140,12 @@ file."
 
 
 ;; Here we get isbn metadata and build a bibtex entry.
-;; http://xisbn.worldcat.org/xisbnadmin/doc/api.htm#getmetadata
 
 ;;;###autoload
 (defun isbn-to-bibtex (isbn bibfile)
   "Get bibtex entry for ISBN and insert it into BIBFILE.
 Nothing happens if an entry with the generated key already exists
-in the file. Data comes from worldcat."
+in the file. Data comes from www.ebook.de."
   (interactive
    (list
     (read-string
@@ -167,7 +166,7 @@ in the file. Data comes from worldcat."
        nil)))
     (completing-read "Bibfile: " (org-ref-possible-bibfiles))))
 
-  (let* ((url (format "https://www.ottobib.com/isbn/%s/bibtex" isbn))
+  (let* ((url (format "https://www.ebook.de/de/tools/isbn2bibtex?isbn=%s" isbn))
 	 (entry))
     (with-current-buffer (url-retrieve-synchronously url t t)
       (goto-char (point-min))