BECI:no update pip in ubuntu 24.04

Author: SwayamInSync

.github/workflows/big_endian.yml

@@ -108,7 +108,6 @@ jobs:
             git config --global --add safe.directory /workspace &&
             
             # Install Python build dependencies (using --break-system-packages for Ubuntu 24.04)
-            python -m pip install --break-system-packages --upgrade pip &&
             python -m pip install --break-system-packages meson>=1.3.2 meson-python wheel &&
             python -m pip install --break-system-packages --pre --upgrade --timeout=60 --extra-index-url https://pypi.anaconda.org/scientific-python-nightly-wheels/simple numpy &&
             python -m pip install --break-system-packages pytest pytest-run-parallel pytest-timeout &&