[v5] Fall back to downloading from go.dev/dl instead of storage.googleapis.com/golang#666

nicholasngai wants to merge 2 commits intoactions:releases/v5actions/setup-go:releases/v5from

nicholasngai:download-fallback-go-dev-dl-cherry-pick-v5nicholasngai/actions-setup-go:download-fallback-go-dev-dl-cherry-pick-v5Copy head branch name to clipboard