Made suggested changes

Added `source $CONDA_PREFIX/etc/conda/activate.d/env_vars.sh` and changed `>` to `>>`

Author: synandi

site/en/install/pip.md

@@ -29,8 +29,9 @@ step-by-step instructions.
     conda install -c conda-forge cudatoolkit=11.8.0
     python3 -m pip install nvidia-cudnn-cu11==8.6.0.163 tensorflow==2.12.*
     mkdir -p $CONDA_PREFIX/etc/conda/activate.d
-    echo 'CUDNN_PATH=$(dirname $(python -c "import nvidia.cudnn;print(nvidia.cudnn.__file__)"))' > $CONDA_PREFIX/etc/conda/activate.d/env_vars.sh
+    echo 'CUDNN_PATH=$(dirname $(python -c "import nvidia.cudnn;print(nvidia.cudnn.__file__)"))' >> $CONDA_PREFIX/etc/conda/activate.d/env_vars.sh
     echo 'export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$CONDA_PREFIX/lib/:$CUDNN_PATH/lib' >> $CONDA_PREFIX/etc/conda/activate.d/env_vars.sh
+    source $CONDA_PREFIX/etc/conda/activate.d/env_vars.sh
     # Verify install:
     python3 -c "import tensorflow as tf; print(tf.config.list_physical_devices('GPU'))"
     ```
@@ -77,8 +78,9 @@ step-by-step instructions.
     conda install -c conda-forge cudatoolkit=11.8.0
     python3 -m pip install nvidia-cudnn-cu11==8.6.0.163 tensorflow==2.12.*
     mkdir -p $CONDA_PREFIX/etc/conda/activate.d
-    echo 'CUDNN_PATH=$(dirname $(python -c "import nvidia.cudnn;print(nvidia.cudnn.__file__)"))' > $CONDA_PREFIX/etc/conda/activate.d/env_vars.sh
+    echo 'CUDNN_PATH=$(dirname $(python -c "import nvidia.cudnn;print(nvidia.cudnn.__file__)"))' >> $CONDA_PREFIX/etc/conda/activate.d/env_vars.sh
     echo 'export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$CONDA_PREFIX/lib/:$CUDNN_PATH/lib' >> $CONDA_PREFIX/etc/conda/activate.d/env_vars.sh
+    source $CONDA_PREFIX/etc/conda/activate.d/env_vars.sh
     # Verify install:
     python3 -c "import tensorflow as tf; print(tf.config.list_physical_devices('GPU'))"
     ```