add cadence to accelerator/librebmc/isa

Signed-off-by: Toshaan Bharvani <toshaan@vantosh.com>

content/groups/accelerator.md

@@ -8,6 +8,7 @@ participation: Member
 git: https://git.openpower.foundation/accelerator/
 discussion: https://discuss.openpower.foundation/c/twg/accelerator/
 meetingminutes: https://meetingminutes.openpower.foundation/accelerator/
+cadence: Bi-weekly
 calendar:
   web: https://discuss.openpower.foundation/c/twg/accelerator/31/l/calendar
   ics: webcal://discuss.openpower.foundation/c/twg/accelerator/l/calendar.ics

content/groups/isa.md

@@ -8,6 +8,7 @@ participation: 'Members'
 git: https://git.openpower.foundation/isa/
 discussion: https://discuss.openpower.foundation/c/twg/isa
 meetingminutes: https://meetingminutes.openpower.foundation/isa/
+cadence: Bi-weekly US/AU alternative TZ
 calendar:
   web: https://discuss.openpower.foundation/c/twg/isa/18/l/calendar
   ics: webcal://discuss.openpower.foundation/c/twg/isa/l/calendar.ics

content/groups/librebmc.md

@@ -9,6 +9,7 @@ participation: 'Public'
 git: https://git.openpower.foundation/librebmc/
 discussion: https://discuss.openpower.foundation/c/sig/librebmc/
 meetingminutes: https://meetingminutes.openpower.foundation/librebmc/
+cadence: Bi-weekly US/EU alternative TZ
 calendar:
   web: https://discuss.openpower.foundation/c/sig/librebmc/11/l/calendar
   ics: webcal://discuss.openpower.foundation/c/sig/librebmc/l/calendar.ics