chore(docs): replace screenshots with the old logo

We need to replace screenshots in the docs that use the old logo.

Location (URL) | # of logos | notes
-- | -- | --
https://coder.com/docs/install/cloud/ec2#launch-a-coder-instance-from-the-from-aws-marketplace | 3 | In screenshots of our AWS listing
https://coder.com/docs/admin/templates | 1 | Screenshot of the dashboard (top of page)
https://coder.com/docs/install/cloud/compute-engine | 4 | In screenshots
https://coder.com/docs/user-guides/workspace-lifecycle#workspace-build-times | 1 | in screenshot
https://coder.com/docs/admin/setup/appearance#announcement-banners | 2 | in screenshots
https://coder.com/docs/admin/templates/creating-templates | 6 | in screenshots
https://coder.com/docs/admin/templates/managing-templates | 2 | in screenshots
https://coder.com/docs/admin/templates/extending-templates | 1 | in screenshots
https://coder.com/docs/admin/templates/open-in-coder | 1 | in video
https://coder.com/docs/admin/templates/troubleshooting#slow-workspace-startup-times | 1 | in screenshot
https://coder.com/docs/admin/external-auth#oauth-provider | 1 | in github screenshot under step 3 "app for your organization"
https://coder.com/docs/admin/integrations/multiple-kube-clusters | 1 | old dashboard screenshot
https://coder.com/docs/admin/monitoring/logs#kubernetes-event-logs | 1 | old dashboard screenshot
https://coder.com/docs/admin/monitoring/health-check | 1 | screenshot at top of page
https://coder.com/docs/admin/monitoring/notifications#user-preferences | 1 | screenshot
https://coder.com/docs/admin/security/secrets#displaying-secrets | 1 | screenshot
https://coder.com/docs/tutorials/template-from-scratch#7-create-the-template-in-coder | 2 | second and third screenshots