Bump actions/upload-artifact from 4 to 6

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 4 to 6.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v4...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>

Author: dependabot[bot]

.github/workflows/build-linux.yml

@@ -24,7 +24,7 @@ jobs:
         docker run -v $(pwd)/deployment/dist:/dist -v $(pwd):/jellyfin -e TAG=${{ matrix.tag }} -e IMG=ubuntu builddeb
         sudo chown --recursive $USER $(pwd)/deployment/dist
     - name: Archive production artifacts
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v6
       with:
         name: ubuntu-${{ matrix.tag }}
         path: ${{ github.workspace }}/deployment/dist/*
@@ -97,7 +97,7 @@ jobs:
         docker run -v $(pwd)/deployment/dist:/dist -v $(pwd):/jellyfin -e TAG=${{ matrix.tag }} -e IMG=debian builddeb
         sudo chown --recursive $USER $(pwd)/deployment/dist
     - name: Archive production artifacts
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v6
       with:
         name: debian-${{ matrix.tag }}
         path: ${{ github.workspace }}/deployment/dist/*

.github/workflows/build-macos.yml

@@ -58,7 +58,7 @@ jobs:
           --app-drop-link 375 150 \
           "${DMG_NAME}" "./build/output/Jellyfin Desktop.app"
     - name: Archive production artifacts
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v6
       with:
         name: ${{ matrix.artifact }}
         path: ${{ github.workspace }}/JellyfinDesktop-*.dmg

.github/workflows/build-windows.yml

@@ -86,12 +86,12 @@ jobs:
         ninja windows_all
       shell: cmd
     - name: Archive installer
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v6
       with:
         name: ${{ matrix.artifact }}-installer
         path: ${{ github.workspace }}/build/JellyfinDesktop-*.exe
     - name: Archive portable ZIP
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v6
       with:
         name: ${{ matrix.artifact }}-portable
         path: ${{ github.workspace }}/build/JellyfinDesktop-*.zip