setup: set proper content type for description

alvarolopez · alvarolopez · commit 4b73f19d17a3 · 2019-07-18T10:10:04.000+02:00
diff --git a/setup.cfg b/setup.cfg
@@ -3,6 +3,8 @@ name = caso
 summary = cASO is an OpenStack Accounting extractor.
 description-file =
     README.md
+description-content-type = text/markdown; charset=UTF-8
+
 author = Alvaro Lopez Garcia
 author-email = aloga@ifca.unican.es
 license = Apache-2
