fixed markdown formatting issue

README.md

@@ -144,9 +144,13 @@ Multiple time based threshold rules can be set for any given pattern. If multipl
 Following notations should be followed when added time based threshold rule
 
 Name : Can be any representation in string but not more than 60 characters.
+
 From : in HHMM format examples: 0000 2400 1330 1250
+
 To   : in HHMM format examples: 0000 2400 1330 1250
+
 On   : Days seperated by comma. Order doesnt matter. Examples; "Sat,Sun", "Mon,Sun,Tue"
+
 Threshold : Same format as default threshold
 
 ![Time based thresholds](https://raw.githubusercontent.com/yesoreyeram/yesoreyeram-boomtable-panel/master/dist/src/img/time-based-thresholds.png)