fix dependencies

Author: bnpaws

huggingface/pytorch/training/docker/2.6/py3/cu126/Dockerfile.gpu

@@ -48,8 +48,8 @@ RUN pip install --no-cache-dir \
     trl==${TRL_VERSION} \
     peft==${PEFT_VERSION} \
     flash-attn==${FLASH_ATTN_VERSION} \
-    dill>=0.4.0 \
-    multiprocess>=0.70.18
+    dill==0.4.0 \
+    multiprocess==0.70.18
 
 
 # hf_transfer will be a built-in feature, remove the env variable then