[FIX] website_blog: put cover selection tip within display

Before this commit the tip of the cover selection step was drawn outside
the display.

After this commit the tip of the cover selection step is within the
display.

task-2728994 (was task-2675252)

X-original-commit: 04df7addb41600e458495caa512342e9840e1259
Part-of: odoo/odoo#83692

addons/website_blog/static/src/js/tours/website_blog.js

@@ -30,7 +30,7 @@ odoo.define("website_blog.tour", function (require) {
         trigger: "we-button[data-background]:nth(1)",
         extra_trigger: "#wrap h1[data-oe-expression=\"blog_post.name\"]:not(:containsExact(\"\"))",
         content: Markup(_t("Set a blog post <b>cover</b>.")),
-        position: "right",
+        position: "top",
     }, {
         trigger: ".o_select_media_dialog .o_we_search",
         content: _t("Search for an image. (eg: type \"business\")"),