Change hookshot logging level to warn

all other bridges use that level

roles/matrix-bridge-hookshot/templates/config.yml.j2

@@ -108,7 +108,7 @@ metrics:
 logging:
   # (Optional) Logging settings. You can have a severity debug,info,warn,error
   #
-  level: info
+  level: warn
 {% if matrix_hookshot_widgets_enabled %}
 widgets:
   # (Optional) EXPERIMENTAL support for complimentary widgets