add sprints day and duration (#126)

Author: vadal

src/pages/[lang]/sprints.astro

@@ -72,6 +72,8 @@ const sprintsData = [
       {t("Sprints are informal coding sessions, and knowledge sharing where people gather together to work on Open-Source projects, suggest changes in existing libraries solve problems. A Sprint is an opportunity for learning and self-development while contributing to Open Source projects.")}
       <br/>
       <span set:html={t("We encourage maintainers to submit their projects by checking out our <a href=\"https://conference.pyladies.com/docs/speakers/sprints_guide/\" class=\"text-pinkpyladies\" target=\"_blank\">sprints guide</a>.")} />
+      <br/>
+      <span set:html={t("Sprints will run on Sunday, December 7th, from 08:00 to 23:59 UTC.")} />
       </Fragment>
     </Sectionhead>