Bump actions/download-artifact from 5 to 6 (#3533)

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

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/deploy-docs.yml

@@ -234,43 +234,43 @@ jobs:
           sudo apt-get install -q -y subversion  
 
       - name: Download website
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: website
           path: ${{ runner.temp }}/website
 
       - name: Download api-c
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: api-c
           path: api-c
 
       - name: Download api-c++
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: api-c++
           path: api-c++
 
       - name: Download api-csharp
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: api-csharp
           path: api-csharp
 
       - name: Download api-java
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: api-java
           path: api-java
 
       - name: Download api-python
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: api-python
           path: api-python
 
       - name: Download api-rust
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: api-rust
           path: api-rust