Update to latest conda patch release

But stick with the same major and minor as the base miniconda installer

base-notebook/Dockerfile

@@ -72,7 +72,7 @@ RUN cd /tmp && \
     $CONDA_DIR/bin/conda config --system --prepend channels conda-forge && \
     $CONDA_DIR/bin/conda config --system --set auto_update_conda false && \
     $CONDA_DIR/bin/conda config --system --set show_channel_urls true && \
-    $CONDA_DIR/bin/conda install --quiet --yes conda=${MINICONDA_VERSION} && \
+    $CONDA_DIR/bin/conda install --quiet --yes conda="${MINICONDA_VERSION%.*}.*" && \
     $CONDA_DIR/bin/conda update --all --quiet --yes && \
     conda clean -tipsy && \
     rm -rf /home/$NB_USER/.cache/yarn && \