Upgrade matrix-corporal (2.7.0 -> 2.8.0)

roles/custom/matrix-corporal/defaults/main.yml

@@ -5,7 +5,7 @@
 matrix_corporal_enabled: true
 
 # renovate: datasource=docker depName=devture/matrix-corporal
-matrix_corporal_version: 2.7.0
+matrix_corporal_version: 2.8.0
 
 matrix_corporal_container_image_self_build: false
 matrix_corporal_container_image_self_build_repo: "https://github.com/devture/matrix-corporal.git"