Update docker.io/hashicorp/vault Docker tag to v1.15.6

Signed-off-by: Renovate Bot <[email protected]>

Author: vshn-renovate

class/defaults.yml

@@ -7,7 +7,7 @@ parameters:
       vault:
         registry: docker.io
         repository: hashicorp/vault
-        version: 1.15.2
+        version: 1.15.6
       bankvaults:
         registry: ghcr.io
         repository: bank-vaults/bank-vaults

tests/golden/defaults/vault/vault/10_vault/vault/templates/server-statefulset.yaml

@@ -80,7 +80,7 @@ spec:
               value: https://$(HOSTNAME).foobar-internal:8201
             - name: HOME
               value: /home/vault
-          image: docker.io/hashicorp/vault:1.15.2
+          image: docker.io/hashicorp/vault:1.15.6
           imagePullPolicy: IfNotPresent
           lifecycle:
             preStop:

tests/golden/defaults/vault/vault/30_backup/32_backup.yaml

@@ -45,7 +45,7 @@ spec:
               value: 'true'
             - name: VAULT_ADDR
               value: http://foobar-active:8200
-          image: docker.io/hashicorp/vault:1.15.2
+          image: docker.io/hashicorp/vault:1.15.6
           imagePullPolicy: IfNotPresent
           name: backup
           ports: []