README.md: Update recent updates section to include validation loss s…

…upport for training scripts

README.md

@@ -14,6 +14,13 @@ The command to install PyTorch is as follows:
 
 ### Recent Updates
 
+Jan 25, 2025:
+
+- `train_network.py`, `sdxl_train_network.py`, `flux_train_network.py`, and `sd3_train_network.py` now support validation loss. PR [#1864](https://github.com/kohya-ss/sd-scripts/pull/1864) Thank you to rockerBOO!
+  - For details on how to set it up, please refer to the PR. The documentation will be updated as needed.
+  - It will be added to other scripts as well.
+  - As a current limitation, validation loss is not supported when `--block_to_swap` is specified.
+
 Dec 15, 2024:
 
 - RAdamScheduleFree optimizer is supported. PR [#1830](https://github.com/kohya-ss/sd-scripts/pull/1830) Thanks to nhamanasu!