adding fallback instructions

requirements.txt

@@ -20,6 +20,15 @@ torchdata==0.11.0
 torchao==0.12.0
 torchcodec=0.5.0
 flash-attn @ https://github.com/Dao-AILab/flash-attention/releases/download/v2.7.4.post1/flash_attn-2.7.4.post1+cu12torch2.7cxx11abiFALSE-cp310-cp310-linux_x86_64.whl
+#
+# if that doesn't work, we can still try to revert back to this:
+#
+#torch==2.6.0
+#torchvision==0.21.0
+#torchdata==0.10.1
+#torchao==0.9.0
+#torchcodec==0.4.0
+#flash-attn @ https://github.com/Dao-AILab/flash-attention/releases/download/v2.7.4.post1/flash_attn-2.7.4.post1+cu12torch2.6cxx11abiFALSE-cp310-cp310-linux_x86_64.whl
 
 # something broke in Transformers > 4.55.4
 transformers==4.55.4