fix: python version

Fix for memory leak requires features from newer python version.

Dockerfile

@@ -64,8 +64,8 @@ RUN curl https://pyenv.run | bash \
   && chown -R root:users $PYENV_ROOT \
   && chmod -R g+w $PYENV_ROOT
 
-RUN pyenv install 3.10 \
-  && pyenv global 3.10 \
+RUN pyenv install 3.11 \
+  && pyenv global 3.11 \
   && pyenv rehash \
   && pip install --no-cache-dir --upgrade setuptools wheel \
   && pip install --no-cache-dir 'detikzify @ git+https://github.com/potamides/DeTikZify' \