release: Fix OUTDIR typo.
release: Fix OUTDIR typo.

This was missed in 58962f0b7b2c62ff5d6d59d647a93e8a43bb1881.

rht/zulip,andersk/zulip,andersk/zulip,zulip/zulip,andersk/zulip,rht/zulip,rht/zulip,andersk/zulip,rht/zulip,zulip/zulip,zulip/zulip,zulip/zulip,zulip/zulip,rht/zulip,zulip/zulip,andersk/zulip,zulip/zulip,rht/zulip,rht/zulip,andersk/zulip,andersk/zulip