Bump taskcluster from 38.0.4 to 38.0.6 (#1935)

Bumps [taskcluster](https://github.com/taskcluster/taskcluster) from 38.0.4 to 38.0.6.
- [Release notes](https://github.com/taskcluster/taskcluster/releases)
- [Changelog](https://github.com/taskcluster/taskcluster/blob/main/CHANGELOG.md)
- [Commits](https://github.com/taskcluster/taskcluster/compare/v38.0.4...v38.0.6)

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

infra/spawn_pipeline_requirements.txt

@@ -1,4 +1,4 @@
 json-e==4.3.0
 pyyaml==5.3.1
 requests==2.25.0
-taskcluster==38.0.4
+taskcluster==38.0.6

requirements.txt

@@ -23,7 +23,7 @@ scikit-learn==0.23.2
 scipy==1.5.4
 shap[plots]==0.37.0
 tabulate==0.8.7
-taskcluster==38.0.4
+taskcluster==38.0.6
 tenacity==6.2.0
 tqdm==4.51.0
 xgboost==1.2.1