Update gen_md_files.yml

update used container image to ubuntu 24.04

.github/workflows/gen_md_files.yml

@@ -19,7 +19,7 @@ env:
 jobs:
   generate-and-deploy:
     container:
-      image: ubuntu:22.04
+      image: ubuntu:24.04
     runs-on: ubuntu-latest
 #    if: github.repository == ''