docs: fix command to ID deprecated 2.0 env vars

[emmettbutler]

Internal clone of #11613

Contributed by @jblz

Checklist

• PR author has checked that all the criteria below are met
• The PR description includes an overview of the change
• The PR description articulates the motivation for the change
• The change includes tests OR the PR description describes a testing strategy
• The PR description notes risks associated with the change, if any
• Newly-added code is easy to change
• The change follows the library release note guidelines
• The change includes or references documentation updates if necessary
• Backport labels are set (if applicable)

Reviewer Checklist

• Reviewer has checked that all the criteria below are met
• Title is accurate
• All changes are related to the pull request's stated goal
• Avoids breaking API changes
• Testing strategy adequately addresses listed risks
• Newly-added code is easy to change
• Release note makes sense to a user of the library
• If necessary, author has acknowledged and discussed the performance implications of this PR as reported in the benchmarks PR comment
• Backport labels are set in a manner that is consistent with the release branch maintenance policy

[github-actions]

CODEOWNERS have been resolved as:

docs/upgrading.rst                                                      @DataDog/python-guild

[github-actions]

Bootstrap import analysis

Comparison of import times between this PR and base.

Summary

The average import time from this PR is: 232 ± 2 ms.

The average import time from base is: 235 ± 2 ms.

The import time difference between this PR and base is: -2.47 ± 0.09 ms.

Import time breakdown

The following import paths have shrunk:

ddtrace.auto 2.052 ms (0.88%)

ddtrace.bootstrap.sitecustomize 1.347 ms (0.58%)

ddtrace.bootstrap.preload 1.347 ms (0.58%)

ddtrace.internal.remoteconfig.client 0.670 ms (0.29%)

ddtrace 0.705 ms (0.30%)

ddtrace._logger 0.033 ms (0.01%)

logging 0.033 ms (0.01%)

traceback 0.033 ms (0.01%)

contextlib 0.033 ms (0.01%)

[pr-commenter]

Benchmarks

Benchmark execution time: 2025-05-21 14:22:46

Comparing candidate commit cfe8bb6 in PR branch jblz/patch-1 with baseline commit 52037dc in branch main.

Found 0 performance improvements and 5 performance regressions! Performance is the same for 447 metrics, 8 unstable metrics.

scenario:iast_aspects-ljust_aspect

• 🟥 execution_time [+1.213µs; +1.398µs] or [+9.370%; +10.798%]

scenario:iast_aspects-ospathbasename_aspect

• 🟥 execution_time [+731.830ns; +809.876ns] or [+17.655%; +19.538%]

scenario:iast_aspects-ospathsplitdrive_aspect

• 🟥 execution_time [+288.426ns; +383.646ns] or [+7.934%; +10.553%]

scenario:iast_aspects-splitlines_aspect

• 🟥 execution_time [+139.472ns; +177.761ns] or [+9.758%; +12.436%]

scenario:telemetryaddmetric-1-distribution-metric-1-times

• 🟥 execution_time [+321.923ns; +386.760ns] or [+10.523%; +12.642%]