- added sprints/28 to code sprints page

Author: doublebyte1

src/assets/img/sprint-28.png

@@ -64,6 +64,11 @@ html(lang='en')
                 .row
                     .col-lg-4
                         .current-card.mb-5.mb-lg-0
+                            a(href='https://events.ogc.org/OGCBuilderDaysCodeSprint', target="_blank")
+                                img.card-img-top(src='../assets/img/sprint-28.png', alt='...')
+                            .card-body
+                                h5.card-title.text-muted.text-uppercase.text-center May 2026
+                    .col-lg-4
                             a(href='https://events.ogc.org/5JointOGC-OSGeo-ASFCodeSprint', target="_blank")
                                 img.card-img-top(src='../assets/img/sprint-27b.png', alt='...')
                             .card-body