ci: build docs on Python 3.11 (fastjsonschema dropped 3.9) - #3775

buildx failed with: ERROR: failed to build: failed to solve: process "/bin/sh -c pip install --no-cache-dir --upgrade pip 'setuptools<70.0.0' && pip install --no-cache-dir torch==2.1.2+cu118 torchvision==0.16.2+cu118 'numpy<2.0.0' --extra-index-url https://download.pytorch.org/whl/cu118 && git clone --branch master --recursive https://github.com/cvg/Hierarchical-Localization.git /opt/hloc && cd /opt/hloc && git checkout v1.4 && python3.10 -m pip install --no-cache-dir . && cd ~ && TCNN_CUDA_ARCHITECTURES=\"${CUDA_ARCHITECTURES}\" pip install --no-cache-dir \"git+https://github.com/NVlabs/tiny-cuda-nn.git@b3473c81396fe927293bdfd5a6be32df8769927c#subdirectory=bindings/torch\" && pip install --no-cache-dir pycolmap==0.6.1 pyceres==2.1 omegaconf==2.3.0" did not complete successfully: exit code: 1