Typo fix PoolWriteConfig.py for DAOD compression

Thomas Streblerrequested to merge
tstreble-master-patch-02536 into 22.0

Self-explanatory, follow-up of !53444 (merged) Should fix the recent discrepancy in the size of the containers observed in the recent CA tests

FYI @jcatmore @nstyles @elmsheus

Merge request reports