jenkins: allow agents to fall back to rpi4

services/jenkins/configmap-jcasc.yaml

@@ -524,7 +524,6 @@ data:
               yaml: |
                 spec:
                   nodeSelector:
-                    hardware: rpi5
                     kubernetes.io/arch: arm64
                     node-role.kubernetes.io/worker: "true"
                   affinity:
@@ -559,6 +558,13 @@ data:
                                 operator: In
                                 values:
                                   - rpi5
+                        - weight: 45
+                          preference:
+                            matchExpressions:
+                              - key: hardware
+                                operator: In
+                                values:
+                                  - rpi4
                   topologySpreadConstraints:
                     - maxSkew: 1
                       topologyKey: kubernetes.io/hostname