fix: use OCI helm for bitnami, bjw-s and weave-gitops

Signed-off-by: Devin Buhl <devin@buhl.casa>

kubernetes/flux/repositories/helm/bitnami.yaml

@@ -5,5 +5,6 @@ metadata:
   name: bitnami
   namespace: flux-system
 spec:
-  interval: 1h
-  url: https://charts.bitnami.com/bitnami
+  type: oci
+  interval: 5m
+  url: oci://registry-1.docker.io/bitnamicharts

kubernetes/flux/repositories/helm/bjw-s.yaml

@@ -5,5 +5,6 @@ metadata:
   name: bjw-s
   namespace: flux-system
 spec:
-  interval: 1h
-  url: https://bjw-s.github.io/helm-charts/
+  type: oci
+  interval: 5m
+  url: oci://ghcr.io/bjw-s/helm

kubernetes/flux/repositories/helm/weave-gitops.yaml

@@ -5,5 +5,6 @@ metadata:
   name: weave-gitops
   namespace: flux-system
 spec:
-  interval: 1h
-  url: https://helm.gitops.weave.works
+  type: oci
+  interval: 5m
+  url: oci://ghcr.io/weaveworks/charts