Update prometheus (2.26.0->2.27.0)

roles/matrix-prometheus/defaults/main.yml

@@ -3,7 +3,7 @@
 
 matrix_prometheus_enabled: false
 
-matrix_prometheus_version: v2.26.0
+matrix_prometheus_version: v2.27.0
 matrix_prometheus_docker_image: "{{ matrix_container_global_registry_prefix }}prom/prometheus:{{ matrix_prometheus_version }}"
 matrix_prometheus_docker_image_force_pull: "{{ matrix_prometheus_docker_image.endswith(':latest') }}"