pytorch-gpu: Use mamba to enable wildcards

Conda gave an error, when trying to build the image with kaniko:
Found invalid version predicate in "*.*"

Mamba seems to work, at least with removed `--no-update-deps`.

pytorch-gpu/Dockerfile

@@ -41,9 +41,8 @@ RUN wget --no-hsts -q -O vscode_cli.tar.gz 'https://code.visualstudio.com/sha/do
     fix-permissions "${CONDA_DIR}"
 
 # install some packages
-# NOTE: without --no-update-deps somehow an undefined symbol error in /opt/conda/lib/python3.11/lib-dynload/_sqlite3.cpython-311-x86_64-linux-gnu.so occurs, which crashes jupyter lab.
 USER ${NB_UID}
-RUN conda install --yes --no-update-deps \
+RUN mamba install --yes \
     # system monitor
     'bpytop' \
     # umap + hdbscan