[email-rotation] automatically add rotation(s) (#9)

This updates rotations with the result of running
`./email-rotation/extend_rotation.py --ensure-weeks=16`.

Author: gburgessiv

email-rotation/rotation.yaml

@@ -58,3 +58,11 @@ rotations:
   - cuviper
   - kbeyls
   start_time: '2026-02-15T00:00:00+00:00'
+- members:
+  - mmdriley
+  - ormris
+  start_time: '2026-03-01T00:00:00+00:00'
+- members:
+  - ojhunt
+  - smithp35
+  start_time: '2026-03-15T00:00:00+00:00'