build: use pipx for installing packaging

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

Author: igaw

.github/workflows/release-python.yml

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