Update nginx Docker tag to v1.27.3

roles/custom/matrix-synapse-reverse-proxy-companion/defaults/main.yml

@@ -13,7 +13,7 @@
 matrix_synapse_reverse_proxy_companion_enabled: true
 
 # renovate: datasource=docker depName=nginx
-matrix_synapse_reverse_proxy_companion_version: 1.27.2-alpine
+matrix_synapse_reverse_proxy_companion_version: 1.27.3-alpine
 
 matrix_synapse_reverse_proxy_companion_base_path: "{{ matrix_synapse_base_path }}/reverse-proxy-companion"
 matrix_synapse_reverse_proxy_companion_confd_path: "{{ matrix_synapse_reverse_proxy_companion_base_path }}/conf.d"