CRAN NEWS and Changelog are out of date

[stephenbfroehlich]

The last version shown in the package NEWS file is 0.6-2 and we're now at 0.7-4. Similarly the Changelog ends in 2021:
https://cloud.r-project.org/web/packages/RPostgreSQL/NEWS
https://cloud.r-project.org/web/packages/RPostgreSQL/ChangeLog