Update pytorch > 2.6.0 (microsoft#25174)

Update pytorch to address
https://nvd.nist.gov/vuln/detail/CVE-2025-32434

Author: sushraja-msft

onnxruntime/python/tools/transformers/requirements.txt

@@ -11,4 +11,4 @@ sentencepiece
 pillow
 
 # please follow https://pytorch.org/ to install PyTorch for your OS
-torch >= 1.13.1
+torch >= 2.6.0

tools/ci_build/requirements/transformers-test/requirements.txt

@@ -4,7 +4,7 @@ packaging
 protobuf==4.21.12
 numpy==1.21.6 ; python_version < '3.9'
 numpy==2.0.0 ; python_version >= '3.9'
-torch
+torch>=2.6.0
 coloredlogs==15.0
 transformers==4.48.0
 parameterized>=0.8.1