man: actually generate h2 headers for letters in index as we meant to

TODO

@@ -64,8 +64,6 @@ Features:
 
 * journald: we currently rotate only after MaxUse+MaxFilesize has been reached.
 
-* reexec journald across initrd transition
-
 * nspawn: bind mount /var/log/journal from the host
 
 * Document:

make-man-index.py

@@ -36,7 +36,7 @@ for n in sorted(index.keys(), key = str.lower):
         if letter is None or n[0].upper() != letter:
                 letter = n[0].upper()
 
-                h2 = SubElement(body, 'h1')
+                h2 = SubElement(body, 'h2')
                 h2.text = letter
 
                 ul = SubElement(body, 'ul')