Update cmake.yml

Author: Gogoshika-ga

.github/workflows/cmake.yml

@@ -76,6 +76,8 @@ jobs:
         sudo update-alternatives --install /usr/bin/clang++ clang++ /usr/bin/clang++-18 100
         clang-18 --version
         clang++-18 --version
+        echo "Clang 18 installed successfully."
+        clang++ --version
 
     - 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.