Update citation: forthcoming arXiv preprint; remove review language

README.md

@@ -96,10 +96,10 @@ the SWE-rebench records for per-instance repository licenses.
 ## Citation
 
 ```bibtex
-@inproceedings{codewalk2027,
-  title     = {CodeWalk: Generating Coding Benchmarks by Walking a Problem Graph},
-  author    = {Anonymous},
-  booktitle = {Under review at ICLR 2027},
-  year      = {2027}
+@misc{codewalk2026,
+  title        = {CodeWalk: Generating Coding Benchmarks by Walking a Problem Graph},
+  author       = {CodeWalk Team},
+  year         = {2026},
+  howpublished = {arXiv preprint (forthcoming)}
 }
 ```