Update argo-cd to version 7.7.15

[ironashram]

This PR updates argo-cd to version 7.7.15

[github-actions]

Terraform used the selected providers to generate the following execution
plan. Resource actions are indicated with the following symbols:
  ~ update in-place
-/+ destroy and then create replacement
 <= read (data resources)

Terraform will perform the following actions:

  # module.provision_apps[0].helm_release.argocd will be updated in-place
  ~ resource "helm_release" "argocd" {
        id                         = "argocd"
        name                       = "argocd"
      ~ version                    = "7.7.13" -> "7.7.15"
        # (27 unchanged attributes hidden)

        # (6 unchanged blocks hidden)
    }

  # module.provision_k3s.data.local_sensitive_file.kubeconfig will be read during apply
  # (depends on a resource or a module with changes pending)
 <= data "local_sensitive_file" "kubeconfig" {
      + content              = (sensitive value)
      + content_base64       = (sensitive value)
      + content_base64sha256 = (known after apply)
      + content_base64sha512 = (known after apply)
      + content_md5          = (known after apply)
      + content_sha1         = (known after apply)
      + content_sha256       = (known after apply)
      + content_sha512       = (known after apply)
      + filename             = "/root/.kube/config-files/kub1k.yaml"
      + id                   = (known after apply)
    }

  # module.provision_k3s.null_resource.k3s_kubeconfig must be replaced
-/+ resource "null_resource" "k3s_kubeconfig" {
      ~ id       = "6461317613035898210" -> (known after apply)
      ~ triggers = { # forces replacement
          ~ "timestamp" = "2025-01-08T20:54:15Z" -> (known after apply)
        }
    }

  # module.provision_k3s.vault_kv_secret_v2.k3s will be updated in-place
  ~ resource "vault_kv_secret_v2" "k3s" {
      ~ data_json           = (sensitive value)
        id                  = "kv/data/kub1k/k3s"
        name                = "kub1k/k3s"
        # (6 unchanged attributes hidden)

        # (1 unchanged block hidden)
    }

Plan: 1 to add, 2 to change, 1 to destroy.