Install dependencies on ubuntu

.github/workflows/cmake-multi-platform.yml

@@ -1,6 +1,6 @@
 # This starter workflow is for a CMake project running on multiple platforms. There is a different starter workflow if you just want a single platform.
 # See: https://github.com/actions/starter-workflows/blob/main/ci/cmake-single-platform.yml
-name: CMake on multiple platforms
+name: Build ChessEngines for Mac, Linux, and Windows using CMake
 
 on:
   push:
@@ -45,6 +45,10 @@ jobs:
     steps:
     - uses: actions/checkout@v4
 
+    - name: Install Dependencies (Linux only)
+      if: matrix.os == 'ubuntu-latest'
+      run: sudo apt-get update && sudo apt-get install -y libgl1-mesa-dev libx11-dev
+
     - name: Set reusable strings
       # Turn repeated input strings (such as the build output directory) into step outputs. These step outputs can be used throughout the workflow file.
       id: strings