Fix daqp version in Arena dockerfile for compatibility with qpsolvers 4.12.0 (#667)

## Summary
Fixes compatibility of Pink IK with latest version of qpsolvers 4.12.0
which requires daqp >= 0.8.5.

Isaac Lab has resolved this upstream in a [merged
PR](isaac-sim/IsaacLab#5556). This PR updates
the version of dqap in the Arena dockerfile manually. The change can be
dropped after the Isaac Lab submodule is bumped past commit
[4934cd0ce5a53b86342f32d89e5491016c841769](isaac-sim/IsaacLab@4934cd0).

---------

Co-authored-by: greptile-apps[bot] <165735046+greptile-apps[bot]@users.noreply.github.com>

Author: peterd-NV

docker/Dockerfile.isaaclab_arena

@@ -52,6 +52,10 @@ RUN /isaac-sim/python.sh -m pip install --no-deps -e ${WORKDIR}/submodules/Isaac
 # Install isaaclab
 RUN ${ISAACLAB_PATH}/isaaclab.sh -i
 
+# DAQP version required for latest qpsolvers 4.12.0. Backport of IsaacLab #5556.
+# Can be dropped once the Isaac Lab submodule is bumped past 4934cd0ce5a53b86342f32d89e5491016c841769.
+RUN /isaac-sim/python.sh -m pip install --force-reinstall daqp==0.8.5
+
 # Install Isaac Teleop Python APIs (retargeters, device I/O, OpenXR bindings)
 RUN /isaac-sim/python.sh -m pip install isaacteleop~=1.1.0 --extra-index-url https://pypi.nvidia.com