Update actions/checkout action to v3

Package	Type	Update	Change
actions/checkout	action	major	`v2` -> `v3`

`Terraform Security Scan` Failed

Show Output

```hcl Result #1 MEDIUM Surge upgrades are disabled in your Kubernetes cluster. Please enable this feature. ──────────────────────────────────────────────────────────────────────────────── cluster.tf Lines 15-39 ───────┬──────────────────────────────────────────────────────────────────────── 15 │ resource "digitalocean_kubernetes_cluster" "k8s" { 16 │ name = var.cluster_name 17 │ region = var.region 18 │ version = data.digitalocean_kubernetes_versions.k8s.latest_version 19 │ #var.kubernetes_version 20 │ 21 │ auto_upgrade = var.auto_upgrade 22 │ tags = var.tags 23 │ 24 │ node_pool { 25 │ name = format("%s-core", var.cluster_name) 26 │ size = element(data.digitalocean_sizes.k8s.sizes, 0).slug 27 │ auto_scale = var.auto_scale 28 │ min_nodes = var.min_nodes 29 │ max_nodes = var.max_nodes 30 │ node_count = var.node_count 31 │ tags = var.node_tags 32 │ labels = var.node_labels 33 │ } 34 │ maintenance_policy { 35 │ start_time = var.maintenance_policy_start_time 36 │ day = var.maintenance_policy_day 37 │ } 38 │ 39 │ } ───────┴──────────────────────────────────────────────────────────────────────── ID digitalocean-compute-surge-upgrades-not-enabled Impact Upgrades may influence availability of your Kubernetes cluster Resolution Enable surge upgrades in your Kubernetes cluster More Information - https://aquasecurity.github.io/tfsec/latest/checks/digitalocean/compute/surge-upgrades-not-enabled/ - https://registry.terraform.io/providers/digitalocean/digitalocean/latest/docs/resources/kubernetes_cluster#surge_upgrade ──────────────────────────────────────────────────────────────────────────────── timings ────────────────────────────────────────── disk i/o 134.81µs parsing 810.553µs adaptation 55.403µs checks 3.126706ms total 4.127472ms counts ────────────────────────────────────────── blocks 20 modules 1 files 5 results ────────────────────────────────────────── ignored 0 excluded 0 critical 0 high 0 medium 1 low 0 1 potential problem(s) detected. ```

nlamirault / terraform-digitalocean-doks