Merge branch 'doc-dlogan-add-legal' into 'master'

Add new generative ai legal file

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/146886



Merged-by: Suzanne Selhorn <sselhorn@gitlab.com>
Approved-by: Suzanne Selhorn <sselhorn@gitlab.com>
Co-authored-by: Diana Logan <dlogan@gitlab.com>

doc/legal/use_generative_ai.md

+---
+stage: none
+group: unassigned
+info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://handbook.gitlab.com/handbook/product/ux/technical-writing/#assignments
+---
+
+# Use of generative AI
+
+Some content on `docs.gitlab.com` was created with the assistance of generative AI tools.
+All content, AI-generated or human-created, is reviewed for accuracy and readability by a GitLab team member.
+
+For more information about making AI-generated contributions to GitLab documentation, see our [DCO or our CLA terms](https://about.gitlab.com/community/contribute/dco-cla/).