update groups to new listing

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

data/groups/accelerator.yaml

@@ -3,6 +3,6 @@ members:
   - ibm
   - vantosh
 nextmeeting :
-  date: 2022-06-20
+  date: 2022-10-24
   time: 15:00
 

data/groups/hub.yaml

@@ -0,0 +1,9 @@
+members:
+  - ibm
+  - openpowerfoundation
+  - oregonstateuniversity
+  - vantosh
+nextmeeting :
+  date: 2024-05-21
+  time: 21:00
+

data/groups/isa.yaml

@@ -1,8 +1,5 @@
 members:
   - ibm
-  - redsemiconductor
   - vantosh
-nextmeeting :
+  - hexintechnologies
-  date: 2022-06-09
-  time: 07:00
 

data/groups/librebmc.yaml

@@ -1,10 +1,9 @@
 members:
-  - antmicro
   - google
   - ibm
   - oregonstateuniversity
   - vantosh
 nextmeeting :
-  date: 2022-06-09
+  date: 2023-03-09
-  time: 15:00
+  time: 16:00