[DOC IMPROVE] Add JDisc postgreso password change

## Affected Article

- Link to the article: https://kb.i-doit.com/en/i-doit-add-ons/jdisc-connector/index.html

## Suggested Improvements

Add information how to change the postgresro password for the database connection to JDisc
Info can be found in https://jdisc.com/guides/JDisc%20Discovery%20AdministrationGuide.pdf at 1.3.6 Change The Database Password
