The operator is very bursty and when starting up may need more memory to reconcile all the CRs initially before it calms down. The default of 256Mi was not sufficient for many clusters, so now we bump up the limit to 512Mi. This is a follow-up from the same change to the helm chart in https://github.com/rook/rook/pull/10195. Signed-off-by: Travis Nielsen <tnielsen@redhat.com>