Update SMC 2026 and IJCB 2026 extended deadlines (#1489)

* Update IJCB deadline

* Update SMC 2026 extended ddl

* Fix deadline format

Author: sarendis56

conference/AI/ijcb.yml

@@ -19,7 +19,7 @@
       id: ijcb2026
       link: https://ijcb2026.ieee-biometrics.org/
       timeline:
-        - deadline: '2026-04-10 23:59:59'
+        - deadline: '2026-04-30 23:59:59'
       timezone: AoE
       date: September 1-4, 2026
       place: Rome, Italy

conference/MX/smc.yml

@@ -35,7 +35,7 @@
       id: smc26
       link: https://www.ieeesmc2026.org/
       timeline:
-        - deadline: '2026-04-19 23:59:59'
+        - deadline: '2026-05-03 23:59:59'
       timezone: UTC-7
       date: October 4-7, 2026
       place: Bellevue, WA, USA