Actually change the standard to C++23

Author: knoepfel

CMakePresets.json

@@ -5,7 +5,7 @@
             "hidden": false,
             "cacheVariables": {
                 "CMAKE_EXPORT_COMPILE_COMMANDS": "YES",
-                "CMAKE_CXX_STANDARD": "20",
+                "CMAKE_CXX_STANDARD": "23",
                 "CMAKE_CXX_STANDARD_REQUIRED": "YES",
                 "CMAKE_CXX_EXTENSIONS": "NO",
                 "CMAKE_PROJECT_TOP_LEVEL_INCLUDES": "CetProvideDependency"