chore(local): scale Linkerd-injected deployments to 1 replica

Local Lima VM (12 GB) doesn't need HA replicas. Each extra pod with a
Linkerd sidecar wastes ~64 MB. Scale people-backend, people-celery-worker,
and people-frontend to 1 replica each.

overlays/local/values-resources.yaml

@@ -146,3 +146,30 @@ spec:
           resources:
             limits:
               memory: 64Mi
+
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: people-backend
+  namespace: lasuite
+spec:
+  replicas: 1
+
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: people-celery-worker
+  namespace: lasuite
+spec:
+  replicas: 1
+
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: people-frontend
+  namespace: lasuite
+spec:
+  replicas: 1