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.yml

@@ -26,13 +26,13 @@ jobs:
       run: 7z a -t7z -m0=lzma2 -mx=9 -mfb=64 -md=32m -mhe=on -p"yug69gG89T98HGUY8y" al-khaser_x64.7z al-khaser_x64.exe
 
     - name: Upload x86 Binaries
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v6
       with:
           name: x86
           path: "al-khaser_x86.7z"
 
     - name: Upload x64 Binaries
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v6
       with:
           name: x64
           path: "al-khaser_x64.7z"