build.sh gawk error: "warning: regexp escape sequence `\:' is not a known regexp operator" again

[Tod Kurt]

I'm getting this error again and I don't know why. Same as #175
What am I doing wrong?
See: https://github.com/adafruit/CircuitPython_Community_Bundle/pull/186/checks

[Tod Kurt]

oh my goodness, I am dumb. Thanks @FoamyGuy! My problem was I had fat-fingered the "git add submodule" command.