Update 2kto4k description: 4096 px decoding; note both variants support multiple aspect ratios

README.md

@@ -59,8 +59,9 @@ Two variants are released for each diffusers-style backbone:
 - **`2k`** — trained at 2048px, used as a 4× decoder (512 LDM → 2048 px), or as
   an 8× decoder for the Scale-RAE backbone (256 → 2048).
 - **`2kto4k`** — trained with multi-resolution data bucketing 2048→3840 and an
-  SD3-style dynamic shift; designed for 1024 LDM → 4K (3840 px) decoding. Only
-  released for the diffusers backbones.
+  SD3-style dynamic shift; designed for 1024 LDM → 4K (4096 px) decoding.
+
+Both checkpoint variants support multiple aspect ratios.
 
 | Path                                                          | Backbone (encoder side)                    | SR factor | Variant   |
 |---------------------------------------------------------------|--------------------------------------------|-----------|-----------|