build(deps): bump actions/upload-artifact from 5 to 6

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

@@ -42,7 +42,7 @@ jobs:
         mv out/windows/Installer.Windows/bin/Release/net472/gcm*.exe artifacts/
 
     - name: Upload artifacts
-      uses: actions/upload-artifact@v5
+      uses: actions/upload-artifact@v6
       with:
         name: win-x86
         path: |
@@ -86,7 +86,7 @@ jobs:
         mv out/linux/Packaging.Linux/Release/tar/*.tar.gz artifacts/
 
     - name: Upload artifacts
-      uses: actions/upload-artifact@v5
+      uses: actions/upload-artifact@v6
       with:
         name: ${{ matrix.runtime }}
         path: |
@@ -131,7 +131,7 @@ jobs:
         mv out/osx/Installer.Mac/pkg/Release/gcm*.pkg artifacts/
 
     - name: Upload artifacts
-      uses: actions/upload-artifact@v5
+      uses: actions/upload-artifact@v6
       with:
         name: ${{ matrix.runtime }}
         path: |