Bump heroku_hatchet from 4.0.9 to 7.3.4#30

dependabot-preview[bot] wants to merge 1 commit intomasterFlatbook/heroku-buildpack-java:masterfrom

dependabot-bundler-heroku_hatchet-7.3.4Flatbook/heroku-buildpack-java:dependabot-bundler-heroku_hatchet-7.3.4Copy head branch name to clipboard