message: update gitmodules to be https
diff: [submodule "src/lib/gj-lib-client"]
  path = src/lib/gj-lib-client
  - url = git@github.com:gamejolt/frontend-lib.git
  + url = https://github.com/gamejolt/frontend-lib.git
  [submodule "src/lib/site-translations"]
  path = src/lib/site-translations
  url = https://github.com/gamejolt/translations.git
  