dependency: bump dependabot/dependabot-core from 0.138.1 to 0.138.2

Can't show this merge request because the source branch dependabot-docker-dependabot-dependabot-core-0.138.2 is missing from project georgekoltsov-multiple-projects-test-4/imported-project-ef029319134ab099. Close this merge request or update the source branch.