Update README.md

Author: RannelT

sql-queries-dates/README.md

@@ -4,3 +4,4 @@
 - [How to Select a Date Without Including the Time in SQL](https://www.baeldung.com/sql/select-date-without-time)
 - [Get Current Timestamp in SQL Server](https://www.baeldung.com/sql/sql-server-current-timestamp)
 - [Group Query Results by Month and Year in SQL](https://www.baeldung.com/sql/group-by-date-parts)
+- [How to Get the Day of the Week in SQL](https://www.baeldung.com/sql/day-of-the-week)