manual: Fix publish options

* doc/org-manual.org (Publishing sample configuration):
* doc/org-guide.org (Publishing):
Fix stylesheet setting in publish: :style is not a valid option; use
:html-head instead. :table-of-contents is not a valid option; use
:with-toc instead. :publishing-function is required.

doc/org-guide.org

@@ -2334,10 +2334,11 @@ example:
 (setq org-publish-project-alist
       '(("org"
          :base-directory "~/org/"
+         :publishing-function org-html-publish-to-html
          :publishing-directory "~/public_html"
          :section-numbers nil
-         :table-of-contents nil
-         :style "<link rel=\"stylesheet\"
+         :with-toc nil
+         :html-head "<link rel=\"stylesheet\"
                     href=\"../other/mystyle.css\"
                     type=\"text/css\"/>")))
 #+end_src

doc/org-manual.org

@@ -16250,8 +16250,8 @@ directory on the local machine.
          :publishing-function org-html-publish-to-html
          :publishing-directory "~/public_html"
          :section-numbers nil
-         :table-of-contents nil
-         :style "<link rel=\"stylesheet\"
+         :with-toc nil
+         :html-head "<link rel=\"stylesheet\"
                     href=\"../other/mystyle.css\"
                     type=\"text/css\"/>")))
 #+end_src