Update hmctspublic.azurecr.io/base/java Docker tag to v21

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
hmctspublic.azurecr.io/base/java	final	major	17-distroless -> 21-distroless

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[hmcts-jenkins-j-to-z]

Plan Result (aat)

Plan: 0 to add, 1 to change, 0 to destroy.

• Update
  • azurerm_resource_group.rg

Change Result (Click me)

  # azurerm_resource_group.rg will be updated in-place
  ~ resource "azurerm_resource_group" "rg" {
        id         = "/subscriptions/1c4f0704-a29e-403d-b719-b90c34ef14c9/resourceGroups/sscs-case-loader-aat"
        name       = "sscs-case-loader-aat"
      ~ tags       = {
          - "application"         = "social-service-child-support"
          - "autoShutdown"        = "true"
          - "builtFrom"           = "https://github.com/HMCTS/sscs-case-loader.git"
          - "businessArea"        = "CFT"
          - "contactSlackChannel" = "#sscs-tech"
          - "environment"         = "staging"
          - "lastUpdated"         = "2025-04-04T09:27:02Z"
          - "managedBy"           = "SSCS"
        } -> (known after apply)
        # (2 unchanged attributes hidden)
    }

Plan: 0 to add, 1 to change, 0 to destroy.

[hmcts-jenkins-j-to-z]

Plan Result (prod)

Plan: 0 to add, 1 to change, 0 to destroy.

• Update
  • azurerm_resource_group.rg

Change Result (Click me)

  # azurerm_resource_group.rg will be updated in-place
  ~ resource "azurerm_resource_group" "rg" {
        id         = "/subscriptions/8999dec3-0104-4a27-94ee-6588559729d1/resourceGroups/sscs-case-loader-prod"
        name       = "sscs-case-loader-prod"
      ~ tags       = {
          - "application"         = "social-service-child-support"
          - "builtFrom"           = "https://github.com/HMCTS/sscs-case-loader.git"
          - "businessArea"        = "CFT"
          - "contactSlackChannel" = "#sscs-tech"
          - "environment"         = "production"
          - "lastUpdated"         = "2025-03-25T13:28:35Z"
          - "managedBy"           = "SSCS"
        } -> (known after apply)
        # (2 unchanged attributes hidden)
    }

Plan: 0 to add, 1 to change, 0 to destroy.