[Issue 7313] Update information about the JDBC connectors for the download page (#7363)
[Issue 7313] Update information about the JDBC connectors for the download page (#7363)

### Motivation

After dividing the old JDBC connector into multiple connectors for different databases, I forgot to modify the connectors.js file.

### Modifications

The connectors.js file was extended with the info about new JDBC connectors.

massakam/pulsar,merlimat/pulsar,yahoo/pulsar,merlimat/pulsar,massakam/pulsar,massakam/pulsar,merlimat/pulsar,massakam/pulsar,massakam/pulsar,yahoo/pulsar,yahoo/pulsar,yahoo/pulsar,massakam/pulsar,merlimat/pulsar,yahoo/pulsar,merlimat/pulsar,merlimat/pulsar,yahoo/pulsar