Add new keynote entry for "Python: the Documentary" screening

src/content/keynoters/documentary.mdx

@@ -0,0 +1,7 @@
+---
+name: "Python: the Documentary" screening and Q&A
+image: ./cultrepo.png
+slug: documentary-and-q-and-a
+tagline: Keynote panel and screening of CultRepo (formerly Honeypot)'s "Python: the Documentary"
+order: 6
+---