Update chi.yml (#1517)

Author: dodoxxb

conference/HI/chi.yml

@@ -34,3 +34,11 @@
       timezone: AoE
       date: April 13 - 17, 2026
       place: Centre de Convencions Internacional de Barcelona, Barcelona, Spain
+    - year: 2027
+      id: chi27
+      link: https://chi2027.acm.org/
+      timeline:
+        - deadline: '2026-09-10 23:59:59'
+      timezone: AoE
+      date: May 10 - 14, 2027
+      place: David L. Lawrence Convention Center, Pittsburgh, USA