add missing prefix to synapse-admin version

roles/custom/matrix-synapse-admin/defaults/main.yml

@@ -14,7 +14,7 @@ matrix_synapse_admin_container_image_self_build: false
 matrix_synapse_admin_container_image_self_build_repo: "https://github.com/etkecc/synapse-admin.git"
 
 # renovate: datasource=docker depName=ghcr.io/etkecc/synapse-admin
-matrix_synapse_admin_version: 0.10.3-etke12
+matrix_synapse_admin_version: v0.10.3-etke12
 matrix_synapse_admin_docker_image: "{{ matrix_synapse_admin_docker_image_name_prefix }}etkecc/synapse-admin:{{ matrix_synapse_admin_version }}"
 matrix_synapse_admin_docker_image_name_prefix: "{{ 'localhost/' if matrix_synapse_admin_container_image_self_build else matrix_container_global_registry_prefix }}"
 matrix_synapse_admin_docker_image_force_pull: "{{ matrix_synapse_admin_docker_image.endswith(':latest') }}"