Update proxy docs to point to new helm chart repo and bump version of chart

What does this MR do and why?

Related issues:

• gitlab-org/workspaces/gitlab-workspaces-proxy#2 (closed) (Issue about version bump)

• #472761 (comment 2079093524) (Issue about rename from remote development to workspaces)

This MR updates the docs to point to the new repository as a source of helm charts, and bumps the chart version to 0.1.14 that includes the fix in: Respect the host-template annotation - do not s... (gitlab-org/workspaces/gitlab-workspaces-proxy#2 - closed)

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• Bumps helm chart version to 0.1.14
• Renames remote development URLs to workspaces

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