update the cmake_install_test runner image to ubuntu 24.04 to pull in the latest nlohmann-json package for the es exporter

Author: dbarker

.github/workflows/ci.yml

@@ -536,7 +536,7 @@ jobs:
 
   cmake_install_test:
     name: CMake install test
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
     steps:
     - uses: actions/checkout@v4
       with: