update README.md for avoiding repeated jpa columns

avoid-repeating-attributes-in-jpa-entities/README.md

@@ -5,4 +5,4 @@ Steps to run this project:
 1. Clone this Git repository
 2. Navigate to the folder `avoid-repeating-attributes-in-jpa-entities`
 3. Run this project with `mvn spring-boot:run`
-4. Visit the H2 console at `http://localhost:8080`
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+4. Visit the H2 console at `http://localhost:8080/h2-console` (JDBC Url for the login form is: `jdbc:h2:mem:testdb`)
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