Bump bind-operator to v0.2.4

Picks up immediate NOTIFY of secondaries on primary zone changes (also-notify
+ shorter seed SOA timers), so dynamic updates / CRD records replicate across
the authoritative replicas in seconds instead of waiting up to the SOA refresh.
Bumps both the operator image and the CRD install.yaml tag.

apps/base/bind-system/deployment.yaml

@@ -21,7 +21,7 @@ spec:
         runAsNonRoot: true
       containers:
         - name: operator
-          image: git.unkin.net/unkin/bind-operator:v0.2.3
+          image: git.unkin.net/unkin/bind-operator:v0.2.4
           args:
             - --metrics-bind-address=:8080
             - --health-probe-bind-address=:8081

apps/base/bind-system/kustomization.yaml

@@ -6,6 +6,6 @@ resources:
   - namespace.yaml
   # CRDs are pulled from the bind-operator repo at the matching tag rather than
   # vendored here, so they never drift from the operator.
-  - https://git.unkin.net/unkin/bind-operator/raw/tag/v0.2.3/config/crd/install.yaml
+  - https://git.unkin.net/unkin/bind-operator/raw/tag/v0.2.4/config/crd/install.yaml
   - rbac.yaml
   - deployment.yaml