Update GitHub Artifact Actions

Author: renovate[bot]

.github/workflows/main.yml

@@ -71,7 +71,7 @@ jobs:
         make tcmalloc_example
 
     # coredump collection to help debug failures inside the CI
-    - uses: actions/upload-artifact@v4
+    - uses: actions/upload-artifact@v5
       if: ${{ failure() }}  # Run only if something went wrong
       with:
         name: coredump

.github/workflows/pypi-release.yml

@@ -24,7 +24,7 @@ jobs:
           run: |
             cd tools && python3 -m build
         - name: store the distribution packages
-          uses: actions/upload-artifact@v4
+          uses: actions/upload-artifact@v5
           with:
             name: python-package-distributions
             path: tools/dist/
@@ -42,7 +42,7 @@ jobs:
 
         steps:
         - name: Download all the dists
-          uses: actions/download-artifact@v4
+          uses: actions/download-artifact@v6
           with:
             name: python-package-distributions
             path: dist/