docs: fix test db password in docs (#984)
docs: fix test db password in docs (#984)

fixes #980
zapov/pgjdbc,jkutner/pgjdbc,jorsol/pgjdbc,AlexElin/pgjdbc,golovnin/pgjdbc,zemian/pgjdbc,jorsol/pgjdbc,sehrope/pgjdbc,AlexElin/pgjdbc,marschall/pgjdbc,pgjdbc/pgjdbc,pgjdbc/pgjdbc,zemian/pgjdbc,davecramer/pgjdbc,jorsol/pgjdbc,whitingjr/pgjdbc,lordnelson/pgjdbc,marschall/pgjdbc,marschall/pgjdbc,davecramer/pgjdbc,sehrope/pgjdbc,pgjdbc/pgjdbc,pgjdbc/pgjdbc,whitingjr/pgjdbc,zapov/pgjdbc,lordnelson/pgjdbc,marschall/pgjdbc,golovnin/pgjdbc,zapov/pgjdbc,AlexElin/pgjdbc,jorsol/pgjdbc,zemian/pgjdbc,whitingjr/pgjdbc,sehrope/pgjdbc,jkutner/pgjdbc,davecramer/pgjdbc,jkutner/pgjdbc,sehrope/pgjdbc,davecramer/pgjdbc,lordnelson/pgjdbc,golovnin/pgjdbc