Rename freebie -> gift

Matches the gift.<domain> vanity redirect's own name instead of a
different word for the same page.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

content/gift/index.md

@@ -0,0 +1,23 @@
+---
+title: "TODO: Story Title"
+description: "TODO: one-line description of the free short story."
+type: "courses"
+eec_slug: "reader-magnet"
+
+# Optional italic line under the title, for handling an objection up front.
+hero_subhead: "TODO: subhead for the landing page"
+
+# Label on the signup form's submit button.
+cta_text: "Send me the story"
+
+# Direct link to the epub in the public downloads bucket — shown as an
+# on-page button immediately after a successful signup, independent of the
+# welcome email (see layouts/partials/course-enroll-form.html).
+download_url: "https://downloads.michaelferrara.org/TODO-story-filename.epub"
+download_text: "Download now"
+
+# Optional heading above the repeated signup form at the bottom of the page.
+repeat_cta_heading: "Want the story?"
+---
+
+TODO: Michael's landing-page copy goes here.