ci: bump actions/checkout from 6.0.2 to 6.0.3#12

byshing merged 3 commits into

masterBitMEX/bitmex-cli:masterfrom

dependabot/github_actions/actions/checkout-6.0.3BitMEX/bitmex-cli:dependabot/github_actions/actions/checkout-6.0.3Copy head branch name to clipboard