chore: update metedata.yaml with the release series

The root metadata.yaml was missing the 2.1 and 2.2 release series which
was causing an issue with the recent 2.2.0 release.

Signed-off-by: Richard Case <[email protected]>

Author: richardcase

metadata.yaml

@@ -38,3 +38,9 @@ releaseSeries:
   - major: 2
     minor: 0
     contract: v1beta1
+  - major: 2
+    minor: 1
+    contract: v1beta1
+  - major: 2
+    minor: 2
+    contract: v1beta1