fix typo on the script installation file (#1109)

docs/source/installation.mdx

@@ -89,7 +89,7 @@ wget https://raw.githubusercontent.com/TimDettmers/bitsandbytes/main/install_cud
 
 # For example, the following installs CUDA 11.7 to ~/local/cuda-11.7 and exports the path to your .bashrc
 
-bash cuda_install.sh 117 ~/local 1
+bash install_cuda.sh 117 ~/local 1
 ```
 
 2. Set the environment variables `BNB_CUDA_VERSION` and `LD_LIBRARY_PATH` by manually overriding the CUDA version installed by PyTorch.