Bump ACTS to v40.0.0

Release notes are here:

• https://github.com/acts-project/acts/releases/tag/v39.2.0
• https://github.com/acts-project/acts/releases/tag/v40.0.0

For reference: @cvarni @ncalace @sabidi @jdandoy @christos @dshope @jmasik @astefl @adye @pibutti