Update some logos that are pulled in to CNCF.io

[thetwopct]

We pull in the logos from Landscape on to the CNCF.io home page. This fixes a few issues with some of them - large image sizes, wrong images used, wrong colors. The images submitted were taken from https://github.com/cncf/artwork.

There was also an issue when I downloaded the repo for file "hami.svg" due to a colliding git path, which I have fixed in this PR.

warning: the following paths have collided (e.g. case-sensitive paths on a case-insensitive filesystem) and only one from the same colliding group is in the working tree:

  'hosted_logos/HAMi.svg'
  'hosted_logos/hami.svg'

Commits:

• Fix case conflict and use one file name for hami.svg
• Updating Keycloak logo to stacked version
• Updating OpenKruise logo to color variant
• Updating Volcano project logo, reduced size from 176KB to 9KB

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