fix: whitesource -> mend (#15729)

.github/ISSUE_TEMPLATE/bug_report.yml

.github/label-actions.yml

docs/usage/assets/images/logo.png

docs/usage/configuration-options.md

docs/usage/getting-started/installing-onboarding.md

docs/usage/getting-started/private-packages.md

docs/usage/getting-started/running.md

docs/usage/key-concepts/automerge.md

docs/usage/node.md

docs/usage/php.md

docs/usage/security-and-permissions.md

docs/usage/troubleshooting.md

lib/modules/manager/bundler/readme.md

lib/modules/manager/gomod/readme.md