[Deps] Bump transformers to 5.12.1 (#29393)

python/pyproject_xpu.toml

@@ -31,7 +31,7 @@ dependencies = [
   "interegular",
   "IPython",
   "llguidance>=0.7.11,<0.8.0",
-  "mistral_common>=1.11.0",
+  "mistral_common>=1.11.5",
   "modelscope",
   "msgspec",
   "ninja",
@@ -65,7 +65,7 @@ dependencies = [
   "torchcodec==0.12.0 ; sys_platform != 'linux' or (sys_platform == 'linux' and platform_machine != 'aarch64' and platform_machine != 'arm64' and platform_machine != 'armv7l')", # torch==2.12.0 on XPU uses torchcodec 0.12.0
   "torchvision==0.27.0+xpu",
   "tqdm",
-  "transformers==5.8.1",
+  "transformers==5.12.1",
   "uvicorn",
   "uvloop",
   # "xgrammar==0.2.1", xgrammar depends on CUDA PyTorch and Triton only