Update the installation.md
Update the installation.md

- Fixed AppKernel registered bundles
- Corrected the initial config
- Corrected the generate command
networking/init-cms-bundle,euclidescohen/init-cms-bundle,euclidescohen/init-cms-bundle,networking/init-cms-bundle,euclidescohen/init-cms-bundle,euclidescohen/init-cms-bundle,networking/init-cms-bundle