Prepare release v40

[heroku-linguist]

Commits since the last release:

• Bump rspec-expectations from 3.12.0 to 3.12.1 (Bump rspec-expectations from 3.12.0 to 3.12.1 #118)
• Bump rspec-expectations from 3.12.1 to 3.12.2 (Bump rspec-expectations from 3.12.1 to 3.12.2 #119)
• Bump heroku_hatchet from 7.3.4 to 7.4.0 (Bump heroku_hatchet from 7.3.4 to 7.4.0 #120)
• Bump heroku_hatchet from 7.4.0 to 8.0.1 (Bump heroku_hatchet from 7.4.0 to 8.0.1 #122)
• Add a scheduled Hatchet app cleaner workflow (Add a scheduled Hatchet app cleaner workflow #123)
• Bump heroku_hatchet from 8.0.1 to 8.0.2 (Bump heroku_hatchet from 8.0.1 to 8.0.2 #126)
• Remove heroku-18 stack support (Remove heroku-18 stack support #128)
• Update changelog check workflow (Update changelog check workflow #129)
• Bump rspec-expectations from 3.12.2 to 3.12.3 (Bump rspec-expectations from 3.12.2 to 3.12.3 #127)
• Fetch app url via Heroku API in CI (Fetch app url via Heroku API in CI #130)
• Bump actions/checkout from 3 to 4 (Bump actions/checkout from 3 to 4 #131)
• Group minor/patch version Ruby Dependabot updates into one PR (Group minor/patch version Ruby Dependabot updates into one PR #132)
• Bump actions/setup-java from 3 to 4 (Bump actions/setup-java from 3 to 4 #133)
• Remove Kissaten dependency (Remove Kissaten dependency #134)
• Clean up CHANGELOG (Clean up CHANGELOG #135)
• Use the new "Prepare release" GitHub Actions workflow (Use the new "Prepare release" GitHub Actions workflow #136)
• Reduce team review request noise from CODEOWNERS (Reduce team review request noise from CODEOWNERS #137)
• Bump the ruby-dependencies group with 2 updates (Bump the ruby-dependencies group with 2 updates #139)
• Add heroku-24 to CI (Add heroku-24 to CI #140)
• Bump the ruby-dependencies group with 2 updates (Bump the ruby-dependencies group with 2 updates #141)
• Bump rspec-expectations in the ruby-dependencies group (Bump rspec-expectations from 3.13.1 to 3.13.2 in the ruby-dependencies group #142)
• Add Micronaut and Quarkus support (Add Micronaut and Quarkus support #144)
• Bump rspec-expectations in the ruby-dependencies group (Bump rspec-expectations from 3.13.2 to 3.13.3 in the ruby-dependencies group #143)
• Bump webrick from 1.8.1 to 1.8.2 (Bump webrick from 1.8.1 to 1.8.2 #145)

For the full diff, see the compare view:
v39...main