Set up symlink from python to python3

containers/oneapi/onedev.Dockerfile

@@ -67,7 +67,7 @@ RUN --mount=type=cache,target=/var/cache/apt                            \
         wget                                                            \
  && localedef -i en_US -f UTF-8 en_US.UTF-8                             \
  && gcc --version                                                       \
- && ln -s /usr/bin/python /usr/bin/python3                              \
+ && ln -s /usr/bin/python3 /usr/bin/python                              \
  && curl -L                                                             \
     "https://packages.gitlab.com/install/repositories/runner/gitlab-runner/script.deb.sh" \
     | bash                                                              \