Add a missing env to eval-codebuff.json #6052

Job	Run time
build-and-check	3m 5s
test-integration-packages/internal	1m 3s
test-integration-packages/billing	1m 1s
test-integration-sdk	1m 17s
test-integration-web	44s
test-integration-packages/agent-runtime	52s
test-integration-common	50s
test-.agents	49s
test-sdk	41s
test-packages/billing	50s
test-web	57s
test-common	49s
test-packages/agent-runtime	45s
test-cli	50s
test-packages/internal	49s
test-integration-cli	49s
	16m 11s

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