Bump version to 0.3.1

Redundant let was left over from past refactoring. This commit removes
it.

It also ensures the search for auto-id:t is made throughout the whole
buffer.

README.org

@@ -1,6 +1,7 @@
 #+title: org-unique-id
 #+author: Lucien Cartier-Tilet
 #+email: lucien@phundrak.com
+[[https://github.com/Phundrak/org-unique-id/actions/workflows/workflow.yml][file:https://github.com/Phundrak/org-unique-id/actions/workflows/workflow.yml/badge.svg]]
 
 * Introduction
 ~org-unique-id~ is a utility package for org users that are tired

org-unique-id.el

@@ -2,7 +2,7 @@
 
 ;; Author: Lucien Cartier-Tilet <lucien@phundrak.com>
 ;; Maintainer: Lucien Cartier-Tilet <lucien@phundrak.com>
-;; Version: 0.3.0
+;; Version: 0.3.1
 ;; Package-Requires: ((emacs "25.1") (org "9.3"))
 ;; Homepage: https://labs.phundrak.com/phundrak/org-unique-id
 ;; Keywords: convenience
@@ -127,13 +127,14 @@ somewhere, i.e. #+OPTIONS: auto-id:t"
 This function executes `org-unique-id' when the buffer’s major
 mode is `org-mode', when the buffer is not read-only, and if
 \\='auto-id:t\\' is found in an #+OPTIONS line."
-  (let ((case-fold-search t))
-    (when (and (eq major-mode 'org-mode)
-               (eq buffer-read-only nil)
-               (save-excursion
-                 (let ((case-fold-search t))
-                   (re-search-forward "^#\\+OPTIONS:.*auto-id:t" (point-max) t))))
-      (org-unique-id))))
+  (interactive)
+  (when (and (eq major-mode 'org-mode)
+             (eq buffer-read-only nil)
+             (save-excursion
+               (goto-char (point-min))
+               (let ((case-fold-search t))
+                 (re-search-forward "^#\\+OPTIONS:.*auto-id:t" (point-max) t))))
+    (org-unique-id)))
 
 (provide 'org-unique-id)