🐛 fix: comment out empty `date_format`

Otherwise dates aren't rendered. Adds explanation in comments.

config.toml

@@ -16,7 +16,8 @@ highlight_code = true
 highlight_theme = "css"
 
 [extra]
-date_format = ""  # If unset, uses format: "6 July 2049" ("%d %B %Y")
+# If unset, uses format: "6 July 2049" ("%d %B %Y"). Don't leave it empty or dates won't appear. Either use a proper format or comment out the line.
+# date_format = "%d %B %Y"
 
 # Custom separator used in title tag and posts metadata (between date, time to read, and tags).
 separator = "•"