chore: bump the actions group with 2 updates

Bumps the actions group with 2 updates: [actions/download-artifact](https://github.com/actions/download-artifact) and [actions/upload-artifact](https://github.com/actions/upload-artifact).


Updates `actions/download-artifact` from 5 to 6
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v5...v6)

Updates `actions/upload-artifact` from 4 to 5
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v4...v5)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: actions
- dependency-name: actions/upload-artifact
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: actions
...

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

Author: dependabot[bot]

.github/workflows/release.yaml

@@ -62,12 +62,12 @@ jobs:
           pixi-version: v0.50.2
           run-install: false
 
-      - uses: actions/download-artifact@v5
+      - uses: actions/download-artifact@v6
         with:
           name: "all-packages"
           path: "~/packages"
 
-      - uses: actions/download-artifact@v5
+      - uses: actions/download-artifact@v6
         with:
           name: "docs"
           path: "~/packages"

.github/workflows/test.yaml

@@ -245,7 +245,7 @@ jobs:
         run: |
           pixi run adbc-make check CI=true VERBOSE=true DRIVER=${{ inputs.driver }}
 
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v5
         with:
           name: drivers-${{ matrix.platform }}-${{ matrix.arch }}
           path: "${{ inputs.subdir || '.' }}/build/libadbc_driver_${{ inputs.driver }}.*"
@@ -272,7 +272,7 @@ jobs:
           pixi-version: v0.50.2
           run-install: false
 
-      - uses: actions/download-artifact@v5
+      - uses: actions/download-artifact@v6
         with:
           pattern: "drivers-*"
           path: "~/drivers"
@@ -308,7 +308,7 @@ jobs:
 
           ls ~/packages
 
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v5
         with:
           name: all-packages
           path: ~/packages

.github/workflows/validate.yaml

@@ -181,7 +181,7 @@ jobs:
         run: |
           pixi run gendocs --output generated
 
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v5
         with:
           name: docs
           path: "${{ inputs.subdir || inputs.driver }}/generated/${{ inputs.driver }}.md"