Update nightly.yml

Author: opensource-krzysztof

.github/workflows/nightly.yml

@@ -160,6 +160,10 @@ jobs:
         del llvm-mingw*.zip
         mv llvm-mingw* c:\llvm-mingw
         echo "c:\llvm-mingw\bin" | Out-File -FilePath $Env:GITHUB_PATH -Encoding utf8 -Append
+    - name: cmake version
+      run: |
+        cmake --version
+
     - name: Configure build
       run: >
         cmake