Fix broken absolute filesystem path in roadmap.md#4

rdobrik merged 1 commit intocodex/add-a2a-supportdscope-io/dscope-camel-agent:codex/add-a2a-supportfrom

copilot/sub-pr-1-another-onedscope-io/dscope-camel-agent:copilot/sub-pr-1-another-oneCopy head branch name to clipboard