Prepare for the R202303 release

Author: cpeel

SETUP/CHANGELOG.md

@@ -7,6 +7,15 @@ see the git history.
 [R202009](https://github.com/DistributedProofreaders/dproofreaders/releases/tag/R202009)
 first before upgrading to R202102 or later releases.**
 
+## R202303
+No scripts are required for this upgrade.
+
+* Support PHP 8.x (cpeel, srjfoo)
+* Format Preview updates (70ray)
+* Check for small images on project load and in Project Quick Check (chrismiceli)
+* Revision of PPV form and calculation algorithm (windymilla)
+* Small adjustments to manual project transition edgecases (srjfoo)
+
 ## R202209
 Scripts supporting this upgrade are in `SETUP/upgrade/18`
 

SETUP/UPGRADE.md

@@ -121,5 +121,8 @@ Run the scripts in the following directories in order
 
 * c/SETUP/upgrade/18/
 
+### Upgrading from release R202209
+No upgrade scripts are required for this release.
+
 ## Install the modified `dp.cron`
 Install the modified `dp.cron`.