Fix error in `run_pgaudit_test()` #266

Job	Run time
build-and-push (13/Dockerfile.c9s, sclorg, c9s, postgresql-13-c9s, QUAY_IMAGE_SCLORG_BUILDER_USER...	8m 1s
build-and-push (15/Dockerfile.c9s, sclorg, c9s, postgresql-15-c9s, QUAY_IMAGE_SCLORG_BUILDER_USER...	7m 30s
build-and-push (16/Dockerfile.c9s, sclorg, c9s, postgresql-16-c9s, QUAY_IMAGE_SCLORG_BUILDER_USER...	7m 25s
build-and-push (16/Dockerfile.c10s, sclorg, c10s, postgresql-16-c10s, QUAY_IMAGE_SCLORG_BUILDER_U...	41s
build-and-push (15/Dockerfile.fedora, fedora, 15, QUAY_IMAGE_FEDORA_BUILDER_USERNAME, QUAY_IMAGE_...	1m 1s
build-and-push (16/Dockerfile.fedora, fedora, 16, QUAY_IMAGE_FEDORA_BUILDER_USERNAME, QUAY_IMAGE_...	46s
	25m 24s

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