Bump actions/download-artifact from 5 to 6

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

.github/workflows/build.yaml

@@ -368,13 +368,13 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Download viewer exe
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: Windows-app
           path: _artifacts
       - name: Download Windows Symbols
         if: env.BUGSPLAT_USER && env.BUGSPLAT_PASS
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: Windows-symbols
       - name: Extract viewer pdb
@@ -404,7 +404,7 @@ jobs:
     steps:
       - name: Download Mac Symbols
         if: env.BUGSPLAT_USER && env.BUGSPLAT_PASS
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: macOS-symbols
       - name: Post Mac symbols
@@ -424,11 +424,11 @@ jobs:
     runs-on: ubuntu-latest
     if: needs.setup.outputs.release_run
     steps:
-      - uses: actions/download-artifact@v5
+      - uses: actions/download-artifact@v6
         with:
           pattern: "*-installer"
 
-      - uses: actions/download-artifact@v5
+      - uses: actions/download-artifact@v6
         with:
           pattern: "*-metadata"
 

.github/workflows/build_viewer.yml

@@ -529,7 +529,7 @@ jobs:
         run: pip install discord-webhook
 
       - name: Download artifacts
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         id: download
         with:
           path: to_deploy        

.github/workflows/sign.yml

@@ -86,7 +86,7 @@ jobs:
         shell: bash
       
       - name: Download Setup.exe Files Artifact
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: setup-exe-files
           path: setup_exe_files