What does this PR do?

rollback a recent hugo version upgrade

Motivation

it seems jqmath-vanilla (or something to do with it's implementation) was somehow broken by the latest version upgrade.

see these pages versus their live counterparts. the jq math rendering should be working and there should not be a JS alert error popping up on page load.

• https://docs-staging.datadoghq.com/brian.deutsch/rollback-hugo-version/tracing/guide/span_and_trace_id_format/
• https://docs-staging.datadoghq.com/brian.deutsch/rollback-hugo-version/tracing/glossary/#execution-time
• https://docs-staging.datadoghq.com/brian.deutsch/rollback-hugo-version/monitors/service_level_objectives/burn_rate/

vs.

• https://docs.datadoghq.com/tracing/guide/span_and_trace_id_format/
• https://docs.datadoghq.com/tracing/glossary/#execution-time
• https://docs.datadoghq.com/monitors/service_level_objectives/burn_rate/

the rest of the site should still behave as it did previous to this hugo upgrade.

Additional Notes

Reviewer checklist

• Review the changed files.
• Review the URLs listed in the Preview section.
• Check images for PII
• Review any mentions of "Contact Datadog support" for internal support documentation.