Add auto nightlight example config (#2446)

By commenting out this config one can have nightlight applied automatically

config/hypr/hyprsunset.conf

@@ -4,3 +4,9 @@ profile {
     time = 07:00
     identity = true
 }
+
+# Enable auto switch to nightlight:
+# profile {
+#     time = 20:00
+#     temperature = 4000
+# }