Bump actions/upload-artifact from 6 to 7

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 6 to 7.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v6...v7)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '7'
  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

@@ -33,7 +33,7 @@ jobs:
         run: cd server/ && castle-engine package --os=win64 --cpu=x86_64 --verbose
       - name: Archive Artifacts
         # See https://github.com/actions/upload-artifact
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: windows-build
           path: |
@@ -46,7 +46,7 @@ jobs:
       - name: Package Linux Server
         run: cd server/ && castle-engine package --os=linux --cpu=x86_64 --verbose
       - name: Archive Artifacts
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: linux-build
           path: |
@@ -68,7 +68,7 @@ jobs:
       # - name: Package Android Server
       #   run: cd server/ && castle-engine package --target=android --verbose
       - name: Archive Artifacts
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: android-build
           path: |
@@ -102,7 +102,7 @@ jobs:
       - name: Package macOS Server
         run: cd server/ && castle-engine package --os=darwin --cpu=x86_64 --verbose
       - name: Archive Artifacts
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: macos-build
           path: |