Clone submodule

Author: andrewbranch

.github/workflows/copilot-setup-steps.yml

@@ -17,6 +17,8 @@ jobs:
     # If you do not check out your code, Copilot will do this for you.
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        with:
+          submodules: true
       - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
       - uses: dtolnay/rust-toolchain@fcf085fcb4b4b8f63f96906cd713eb52181b5ea4 # stable
       - uses: ./.github/actions/setup-go