Update Dockerfile

Dockerfile

@@ -26,7 +26,7 @@ RUN conda update -n base -c defaults conda
 RUN conda create -n instantsplat python=3.11 cmake=3.14.0 -y && \
     echo "source activate instantsplat" > ~/.bashrc && \
     /bin/bash -c "source activate instantsplat" && \
-    conda install pytorch torchvision pytorch-cuda=12.1 -c pytorch -c nvidia -y && \
+    conda install pytorch torchvision pytorch-cuda=11.8 -c pytorch -c nvidia -y && \
     cd InstantSplat && \
     pip install -r requirements.txt && \
     pip install submodules/simple-knn && \