Update cmake-multi-platform.yml

Author: TheNicker

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

@@ -48,6 +48,13 @@ jobs:
 
     steps:
     - uses: actions/checkout@v3
+
+  #Install mingw for ubuntu only
+    - name: Install Dependencies
+      if: matrix.os == 'ubuntu-latest' and matrix.c_compiler == mingw
+      run: |
+        sudo apt-get update
+        sudo apt-get install -y build-essential mingw-w64
  
     - name: Git update submodules 
       run: |