ci: install CMake on Ubuntu for llama.cpp build

Author: devwhodevs

.github/workflows/ci.yml

@@ -14,6 +14,9 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4
+      - name: Install CMake (Ubuntu)
+        if: runner.os == 'Linux'
+        run: sudo apt-get update && sudo apt-get install -y cmake
       - uses: dtolnay/rust-toolchain@stable
         with:
           components: rustfmt, clippy