Add jpbetz as PRR approver for KEP 4192 beta

Author: michaelasp

keps/prod-readiness/sig-api-machinery/4192.yaml

@@ -1,3 +1,5 @@
 kep-number: 3299
 alpha:
   approver: "@deads2k"
+beta:
+  approver: "@jpbetz"

keps/sig-api-machinery/4192-svm-in-tree/kep.yaml

@@ -21,7 +21,7 @@ see-also:
   - "keps/sig-api-machinery/2343-automated-storage-version-migration-with-storage-version-hash"
   - "keps/sig-api-machinery/4020-unknown-version-interoperability-proxy"
 stage: alpha
-latest-milestone: "v1.31"
+latest-milestone: "v1.35"
 # The milestone at which this feature was, or is targeted to be, at each stage.
 milestone:
   alpha: "v1.30"