fix: update vault_transt_tls_ca_cert_file to use user provided value and keeping sensible default

Author: khawarizmus

defaults/main.yml

@@ -329,7 +329,7 @@ vault_transit_disable_renewal: false
 vault_transit_key_name: 'autounseal'
 vault_transit_mount_path: "transit/"
 # vault_transit_namespace: ''
-vault_transit_tls_ca_cert_file: "{{ vault_tls_ca_file }}"
+vault_transit_tls_ca_cert_file: "{{ vault_transit_tls_ca_cert_file | default(vault_tls_ca_file) }}"
 vault_transit_tls_client_cert_file: "{{ vault_transit_tls_client_cert | default('autounseal_client_cert.pem', true) }}"
 vault_transit_tls_client_key_file: "{{ vault_transit_tls_client_key | default('autounseal_client_key.pem', true) }}"
 # vault_transit_tls_server_name: ''