Update README for comcam manual defects.

comCam/manual_defects/README.md

@@ -1,9 +1,11 @@
 This directory contains manual defects for the LSSTComCam instrument.
-The LSSTComCam focal plane consists of one raft of ITL sensors.
-As we do not have QE scans of LSSTComCam, we have simply taken an average of all the ITL sensors from the LSSTCam sensor QE scans as processed in DM-40164.
+
+The defects are a combination of manually identified phosphorescent regions, unmasked bad columns, edges of high CTI amplifiers, and bad bias columns.
 
 Data Processing
 ---------------
 
-Look at ingest_manual_defects.py attached to https://rubinobs.atlassian.net/browse/DM-47365
-for the steps done to process these defects.
+The manual defects were generated by running (at USDF):
+```
+python $OBS_LSST_DIR/python/lsst/obs/lsst/script/write_comcam_manual_defects.py
+```