Exclude '[' and ']' in `org-plain-link-re'

* lisp/org.el (org-make-link-regexps): Do it.

TINYCHANGE

lisp/org.el

@@ -5847,7 +5847,7 @@ This should be called after the variable `org-link-parameters' has changed."
 	  org-plain-link-re
 	  (concat
 	   "\\<" types-re ":"
-	   "\\([^ \t\n()<>]+\\(?:([[:word:]0-9_]+)\\|\\([^[:punct:] \t\n]\\|/\\)\\)\\)")
+	   "\\([^][ \t\n()<>]+\\(?:([[:word:]0-9_]+)\\|\\([^[:punct:] \t\n]\\|/\\)\\)\\)")
 	  ;;	 "\\([^]\t\n\r<>() ]+[^]\t\n\r<>,.;() ]\\)")
 	  org-bracket-link-regexp
 	  "\\[\\[\\([^][]+\\)\\]\\(\\[\\([^][]+\\)\\]\\)?\\]"