Update submodules

M  .oh-my-zsh
M  .vim/bundle/vim-fugitive

Automatically generated:
  source: Gitlab CI
  runner: bth-tower01/3 (12.0.2)
  job:    https://code.kodo.org.uk/dom/dotfiles/-/jobs/1415 (#1415)
  time:   Sun Aug 11 04:21:05 UTC 2019