[BugFix] Wrong spec returned (#2604) #3484

Job	Run time
unittests-meltingpot / linux-job	6m 49s
unittests-pettingzoo / linux-job	8m 29s
unittests-atari-dqn (3.9, 12.1) / linux-job	6m 13s
unittests-brax (3.11, 12.1) / linux-job	9m 50s
unittests-d4rl (3.9, 12.1) / linux-job	5m 52s
unittests-envpool (3.9, 12.1) / linux-job	5m 48s
unittests-gendgrl (3.9, 12.1) / linux-job	5m 55s
unittests-gym (3.9, 12.1) / linux-job	7m 57s
unittests-jumanji (3.9, 12.1) / linux-job	8m 15s
unittests-minari (3.9, 12.1) / linux-job	6m 1s
unittests-open_spiel (3.9, 12.1) / linux-job	8m 0s
unittests-openx (3.9, 12.1) / linux-job	5m 53s
unittests-robohive (3.9, 12.1) / linux-job	7m 10s
unittests-roboset (3.9, 12.1) / linux-job	5m 50s
unittests-sklearn (3.9, 12.1) / linux-job	5m 55s
unittests-smacv2 (3.9, 12.1) / linux-job	15m 1s
unittests-unity_mlagents (3.10.12, 12.1) / linux-job	8m 9s
unittests-vd4rl (3.9, 12.1) / linux-job	5m 45s
unittests-vmas (3.9, 12.1) / linux-job	8m 16s
	2h 21m 8s

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