Update TODOs after release

Generate documentation for 1.6.5

Generated documentation for release 1.6.4

Generated documentation for release 1.6.3

Generate documentation for release 1.6.2

Upgrade Gradle to 7.3.1

Generated documentation for release 1.6.0

Generated documentation for 1.5.6

Generated documentation for 1.5.5

Fixed release notes for 1.5.4