Bump actions/upload-artifact from 5 to 6

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 5 to 6.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](https://github.com/actions/upload-artifact/compare/v5...v6)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/release.yml

@@ -46,7 +46,7 @@ jobs:
       run: python -m hatch build
 
     - name: Upload artifact
-      uses: actions/upload-artifact@v5
+      uses: actions/upload-artifact@v6
       with:
         name: sdist-and-wheel
         path: dist/*
@@ -165,7 +165,7 @@ jobs:
       continue-on-error: true # Continue if attestation fails (it will fail on forks)
 
     - name: Upload built binary package
-      uses: actions/upload-artifact@v5
+      uses: actions/upload-artifact@v6
       with:
         name: binaries-${{ matrix.job.release_suffix }}
         path: dist/binary/*

Dockerfile

@@ -1,5 +1,5 @@
 # syntax=docker/dockerfile:1
-FROM python:3.14-alpine3.23 AS base
+FROM python:3.13-alpine3.21 AS base
 
 FROM base AS compiler
 
@@ -19,9 +19,9 @@ RUN apk add --no-cache gcc musl-dev && \
     pip install -r requirements.txt && \
     pip uninstall -y pip wheel && \
     apk del gcc musl-dev && \
-    python3 -m compileall -b -f /usr/local/lib/python3.14/site-packages && \
-    find /usr/local/lib/python3.14/site-packages -name "*.py" -type f -delete && \
-    find /usr/local/lib/python3.14/ -name "__pycache__" -type d -exec rm -rf {} +
+    python3 -m compileall -b -f /usr/local/lib/python3.13/site-packages && \
+    find /usr/local/lib/python3.13/site-packages -name "*.py" -type f -delete && \
+    find /usr/local/lib/python3.13/ -name "__pycache__" -type d -exec rm -rf {} +
 
 FROM base