build: install packaging globally

The pipx install step is not working.

Signed-off-by: Daniel Wagner <wagi@kernel.org>

Author: igaw

.github/workflows/release-python.yml

@@ -22,8 +22,11 @@ jobs:
     container:
       image: ghcr.io/linux-nvme/debian.python:latest
     steps:
-      - name: Install packaging via pipx
-        run: pipx install packaging
+      - name: Install Python (if missing)
+        run: apt-get update && apt-get install -y python3 python3-pip
+
+      - name: Update python dependencies
+        run: python3 -m pip install -U packaging --break-system-packages
 
       - uses: actions/checkout@v4