Bump docker/setup-buildx-action from 4.3.0 to 4.4.0 - #52

buildx failed with: ERROR: failed to build: failed to solve: process "/bin/bash -o pipefail -c wget --no-verbose $AMBERTOOLS_DL/ambertools$AMBERTOOLS_VER.tar.bz2 && tar xjf ambertools$AMBERTOOLS_VER.tar.bz2 && rm ambertools$AMBERTOOLS_VER.tar.bz2 && mv ambertools${AMBERTOOLS_VER}_src ambertools_src" did not complete successfully: exit code: 1