What steps did you take:

Create a deployment yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
  labels:
    app: nginx
spec:
  replicas: 0
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.14.2
        ports:
        - containerPort: 80

In another terminal watch deployments

kubectl get deployment -w -oyaml

What happened:
After the deployment is applied kapp immediately updates it - you can see generation: 2.

Looking at my k8s service API logs it causes Conflicts on creating and updating resources

This is causing to fail deploying at times

kapp: Error: Applying update deployment/activator (apps/v1) namespace: 24f0bc17-06dc-424b-a9db-8d4e744d7790:
  Failed to update due to resource conflict  (approved diff no longer matches):
  Updating resource deployment/activator (apps/v1) namespace: 24f0bc17-06dc-424b-a9db-8d4e744d7790:
  API server says:
    Operation cannot be fulfilled on deployments.apps "activator": the object has been modified; please apply your changes to the latest version and try again (reason: Conflict)

What did you expect:
kapp doesn't mutate resources after they are created/updated

Anything else you would like to add:
[Additional information that will assist in solving the issue.]

Environment:

• kapp version (use kapp --version): v0.46.0
• OS (e.g. from /etc/os-release): Mac OS X/Linux
• Kubernetes version (use kubectl version) - K8s 1.21/1.22

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