readme: mention lipsum_title

Author: mgeisler

README.md

@@ -61,13 +61,25 @@ This generates the lorem ipsum text show above:
 The text becomes random after 18 words, so you might not see exactly
 the same text.
 
+Use `lipsum_title` instead if you just need a short text suitable for
+a document title or a section heading. The text generated by that
+function looks like this:
+
+> Refugiendi et Omnino Rerum
+
+Small words are kept uncapitalized and punctuation is stripped from
+all words.
+
 
 ## Release History
 
 This is a changelog with the most important changes in each release.
 
 ### Unreleased
 
+The new `lipsum_title` function can be used to generate a short string
+suitable for a document title or a section heading.
+
 Dependencies were updated and the oldest supported version of Rust is
 now 1.17.