Update config.toml

Since a change in the latest zola version required changing the name
of a setting anyway, I took the opportunity to review the settings and
make some adjustments.

config.toml

@@ -1,12 +1,14 @@
 base_url = "https://www.jotoho.de/"
 default_language = "en"
 minify_html = true
-generate_feed = true
+generate_feeds = true
+feed_filenames = ["atom.xml", "rss.xml"]
+author = "Jonas Tobias Hopusch"
 
 [markdown]
 highlight_code = true
 render_emoji = true
 external_links_no_referrer = true
-
-[extra]
-# Put all your custom variables here
+smart_punctuation = true
+lazy_async_image = true
+bottom_footnotes = true