Update rulemlrr.yml (1 week extension to the abstract and paper submission deadlines) (#1524)

I am a general co-chair of this conference

Author: mantassimkus

conference/AI/rulemlrr.yml

@@ -11,8 +11,8 @@
       id: rulemlrr2026
       link: https://2026.declarativeai.net/events/ruleml-rr
       timeline:
-        - abstract_deadline: '2026-05-08 23:59:59'
-          deadline: '2026-05-15 23:59:59'
+        - abstract_deadline: '2026-05-15 23:59:59'
+          deadline: '2026-05-22 23:59:59'
       timezone: AoE
       date: August 24-26, 2026
       place: Vilnius, Lithuania