firefly-iii: Set imagePullPolicy: IfNotPresent

We don't want to pull public container images that already exist.  This
creates prevents pods from starting if there is any connectivity issue
with the upstream registry.

firefly-iii/firefly-iii.yaml

@@ -66,6 +66,7 @@ spec:
       containers:
       - name: firefly-iii
         image: docker.io/fireflyiii/core:version-6.0.19
+        imagePullPolicy: IfNotPresent
         envFrom:
         - configMapRef:
             name: firefly-iii
@@ -127,6 +128,7 @@ spec:
         spec:
           containers:
           - image: docker.io/library/busybox
+            imagePullPolicy: IfNotPresent
             name: wget
             command:
             - wget