Bump the docs version to 8.17.4 (#3189)

Nassim Kammah canceled after 10m 3s

Triggered by a doc change in elastic/elasticsearch PR: #123074

Agent for job :pipeline::arrow_up: Upload Pipeline: .buildkite/build_pr_pipeline.yml (0195d29a-be3f-4d8d-a1d6-f336f8194349): bk-agent-prod-k8s-1742995124482558437 (k8s) - [metrics] [events]

Agent for job setup (0195d29b-2a2b-4c50-83af-30191d8eaf7e): bk-agent-prod-k8s-1742995157379443233 (k8s) - [metrics] [events]

Agent for job 0195d29b-2a2a-49be-8045-b99d7afc6674: bk-agent-prod-k8s-1742995157681648086 (k8s) - [metrics] [events]

Agent for job :hammer: Build docs PR (0195d29b-2a2b-45fa-9e7c-7eba8758df59): bk-agent-prod-gcp-1742995173483862327 (gcp) - [metrics] [events]

:pipeline:猬嗭笍 Upload Pipeline: .buildkite/build_pr_pipeline.ymlbuildkite-agent pipeline upload .buildkite/build_pr_pipeline.yml
Waited 20s
Ran in 9s
.buildkite/scripts/cancel_running_pr.sh || true.buildkite/scripts/cancel_running_pr.sh || true
Waited 25s
Ran in 8s
setupcurl -s -L \ && -X POST \ && -H "Accept: application/vnd.github+json" \ && -H "Authorization: Bearer ${VAULT_GITHUB_TOKEN}" \ && -H "X-GitHub-Api-Version: 2022-11-28" \ && "https://api.github.com/repos/elastic/elasticsearch/statuses/c998b38d2275ea7d54dc62d172db6034f900f7b0" \ && -d '{"state":"pending","target_url":"'https://buildkite.com/elastic/docs-build-pr/builds/294076'","description":"Build started","context":"buildkite/'docs-build-pr'"}'
Waited 24s
Ran in 2s
馃敤 Build docs PR.buildkite/scripts/build_pr.sh
Canceled
Waited 52s
Ran in 8m 49s
teardownstatus_state=failure && if [ $(buildkite-agent step get "outcome" --step "build-pr") == "passed" ]; then && status_state=success && fi && export status_state && curl -s -L \ && -X POST \ && -H "Accept: application/vnd.github+json" \ && -H "Authorization: Bearer ${VAULT_GITHUB_TOKEN}" \ && -H "X-GitHub-Api-Version: 2022-11-28" \ && "https://api.github.com/repos/elastic/elasticsearch/statuses/c998b38d2275ea7d54dc62d172db6034f900f7b0" \ && -d '{"state":"'$status_state'","target_url":"'https://buildkite.com/elastic/docs-build-pr/builds/294076'","description":"Build finished","context":"buildkite/'docs-build-pr'"}'
Canceled
Total Job Run Time: 9m 8s