add exception to SIG Std/Cert 2025

Signed-off-by: Matthias Büchse <matthias.buechse@cloudandheat.com>

Author: mbuechse

teams/sig_standard_cert/team_meetings.yml

@@ -76,3 +76,5 @@ events:
       interval:
         weeks: 1
       until: 2025-02-28
+      except_on:
+        - 2025-01-30 14:05:00  # skip this one; MB (and other key people) n/a