chore: fix hashicorp vault k8s example

Author: clement-tourriere

charts/ggscout/examples/hashicorpvault-k8s/values.yaml

@@ -9,9 +9,8 @@ inventory:
         vault_address: "https://your-vault-address-here.com"
         auth:
           auth_mode: "k8s"
-          k8s:
-            role: "${VAULT_K8S_ROLE}"
-            mount: "kubernetes"  # This is the default; if the authentication path has changed, this must be updated
+          role: "${VAULT_K8S_ROLE}"
+          mount: "kubernetes"  # This is the default; if the authentication path has changed, this must be updated
         fetch_all_versions: true # Fetch all versions of secrets or not
         path: "secret/dev" # Vault path or unspecified
         mode: "read/write" # Can be `read`, `write` or `read/write` depending on wether fetch and/or sync are enabled