Update Open Source Partners logos to link to project home pages

Why is this change being made?

These changes impact the newly created Open Source Partners page. Specifically, it adds new functionality to the projects' logo behavior.

I think that the expected behavior of clicking on a project's logo is to be taken to that project's homepage. Right now, the logo links to a blog post about the project's move to GitLab. Since not all projects had a blog post about their migration, some logos stay grey / un-clickable upon rollover.

If we merge this MR and have the logos link to the projects' homepages, then we should figure out where to add content like blog posts about migrations. For example, is there a way we can add another section at the bottom of the page with links to the blog posts?

Author Checklist

• Provided a concise title for the MR
• Added a description to this MR explaining the reasons for the proposed change, per say-why-not-just-what
• Assign this change to the correct DRI
  • If the DRI for the page/s being updated isn’t immediately clear, then assign it to your manager.
  • If your manager does not have merge rights, please ask someone to merge it AFTER it has been approved by your manager in #mr-buddies.
  • If the changes relate to any part of the project other than updates to content and/or data files please make sure to ping @gl-static-site-editor in a comment for a review and merge. For example changes to .gitlab-ci.yml, JavaScript/CSS/Ruby code or the layout files.

For help with failing pipelines reach out in #mr-buddies in Slack