Bump sigstore/cosign/cosign from v3.0.5 to v3.0.6 in /builds#2086

dependabot[bot] wants to merge 1 commit intomainheroku/heroku-buildpack-python:mainfrom

dependabot/docker/builds/sigstore/cosign/cosign-v3.0.6heroku/heroku-buildpack-python:dependabot/docker/builds/sigstore/cosign/cosign-v3.0.6Copy head branch name to clipboard