Need to fix Helidon SE - DB Client doc

[shukawam]

The dependencies included in Getting Started are incorrect.

now: com.h2.database

<dependencies>
     <dependency>
         <groupId>io.helidon.dbclient</groupId> 
         <artifactId>helidon-dbclient</artifactId>
     </dependency>
     <dependency>
         <groupId>io.helidon.dbclient</groupId> 
         <artifactId>helidon-dbclient-jdbc</artifactId>
     </dependency>
     <dependency>
         <groupId>com.h2.database</groupId> 
         <artifactId>h2</artifactId>
         <version>1.4.200</version>
    </dependency>
</dependencies>

should be: com.h2database

<dependencies>
     <dependency>
         <groupId>io.helidon.dbclient</groupId> 
         <artifactId>helidon-dbclient</artifactId>
     </dependency>
     <dependency>
         <groupId>io.helidon.dbclient</groupId> 
         <artifactId>helidon-dbclient-jdbc</artifactId>
     </dependency>
     <dependency>
         <groupId>com.h2database</groupId> 
         <artifactId>h2</artifactId>
         <version>1.4.200</version>
    </dependency>
</dependencies>