Revert "org-capture: Do not save buffer when running `org-capture-finalize'"

This reverts commit b4422add3745c26ec3b2e11b8da425844b2e9d3d.

Revert the regression in Org capture + auto-saving behavior.

Ref: https://lists.gnu.org/r/emacs-orgmode/2018-09/msg00325.html

lisp/org-capture.el

@@ -796,6 +796,7 @@ captured item after finalizing."
 	(org-encrypt-entry)))
 
     ;; Kill the indirect buffer
+    (save-buffer)
     (let ((return-wconf (org-capture-get :return-to-wconf 'local))
 	  (new-buffer (org-capture-get :new-buffer 'local))
 	  (kill-buffer (org-capture-get :kill-buffer 'local))