Checkouts on CI clone issue

[Kyle-Ye]

On CI the ssh is not work.

fatal: Could not read from remote repository.
    Please make sure you have the correct access rights
    and the repository exists.
    fatal: clone of 'git@github.com:jcmosc/swift-runtime-headers.git' into submodule path '/Users/kyle/Workspace/OpenSwiftUIProject/OpenAttributeGraph/.build/checkouts/Compute/

Workaround:

      - name: Configure git to use HTTPS instead of SSH
        run: git config --global url."https://github.com/".insteadOf "git@github.com:"

Suggestion:

Update .gitmodules file to use https instead of ssh.