Update git submodules

Update git submodules

* Update docs/submodules/releng from branch 'master'
  to 559f32dec5d0d693792a04fab14eeb51939b90ea
  - Merge "Configure voting for verify jobs"
  - Configure voting for verify jobs

    OSH integration to XCI is ongoing but OpenSUSE jobs vote -1,
    slowing down the integration work. Also, bumping OSA and Kubespray
    would be easier while we focus on single distro to make jobs green.

    Voting will gradually be enabled once the basics working.

    Change-Id: Ic34177741efca683b4c0c1c474fc4b9d826712ec
    Signed-off-by: Fatih Degirmenci <fdegir@gmail.com>