patches: update patch release calendar for December/21 cycle

Signed-off-by: Carlos Panato <ctadeu@gmail.com>

data/releases/schedule.yaml

@@ -1,10 +1,13 @@
 schedules:
 - release: 1.22
-  next: 1.22.4
-  cherryPickDeadline: 2021-11-12
-  targetDate: 2021-11-17
+  next: 1.22.5
+  cherryPickDeadline: 2021-12-10
+  targetDate: 2021-12-15
   endOfLifeDate: 2022-10-28
   previousPatches:
+    - release: 1.22.4
+      cherryPickDeadline: 2021-11-12
+      targetDate: 2021-11-17
     - release: 1.22.3
       cherryPickDeadline: 2021-10-22
       targetDate: 2021-10-27
@@ -15,11 +18,14 @@ schedules:
       cherryPickDeadline: 2021-08-16
       targetDate: 2021-08-19
 - release: 1.21
-  next: 1.21.7
-  cherryPickDeadline: 2021-11-12
-  targetDate: 2021-11-17
+  next: 1.21.8
+  cherryPickDeadline: 2021-12-10
+  targetDate: 2021-12-15
   endOfLifeDate: 2022-06-28
   previousPatches:
+    - release: 1.21.7
+      cherryPickDeadline: 2021-11-12
+      targetDate: 2021-11-17
     - release: 1.21.6
       cherryPickDeadline: 2021-10-22
       targetDate: 2021-10-27
@@ -40,11 +46,14 @@ schedules:
       targetDate: 2021-05-12
       note: Regression https://groups.google.com/g/kubernetes-dev/c/KuF8s2zueFs
 - release: 1.20
-  next: 1.20.13
-  cherryPickDeadline: 2021-11-12
-  targetDate: 2021-11-17
+  next: 1.20.14
+  cherryPickDeadline: 2021-12-10
+  targetDate: 2021-12-15
   endOfLifeDate: 2022-02-28
   previousPatches:
+    - release: 1.20.13
+      cherryPickDeadline: 2021-11-12
+      targetDate: 2021-11-17
     - release: 1.20.12
       cherryPickDeadline: 2021-10-22
       targetDate: 2021-10-27