Pin Ubuntu to 24.04 for CI stability

Signed-off-by: Sebastian Pipping <[email protected]>

Author: hartwork

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

@@ -23,11 +23,11 @@ jobs:
       #
       # To add more build types (Release, Debug, RelWithDebInfo, etc.) customize the build_type list.
       matrix:
-        os: [ubuntu-latest]
+        os: [ubuntu-24.04]
         build_type: [Release, Debug]
         c_compiler: [clang]
         include:
-          - os: ubuntu-latest
+          - os: ubuntu-24.04
             c_compiler: clang
             cpp_compiler: clang++