Bump actions/upload-artifact from 3 to 4

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 3 to 4.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v3...v4)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/main.yml

@@ -101,7 +101,7 @@ jobs:
 
       - name: Upload installer assets
         if: github.ref == 'refs/heads/master' && github.event_name != 'pull_request'
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: Assets
           path: |
@@ -110,7 +110,7 @@ jobs:
 
       - name: Upload Sandboxie x64
         if: github.ref == 'refs/heads/master' && github.event_name != 'pull_request'
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: Sandboxie_x64
           path: |
@@ -193,7 +193,7 @@ jobs:
 
       - name: Upload Sandboxie ARM64
         if: github.ref == 'refs/heads/master' && github.event_name != 'pull_request'
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: Sandboxie_ARM64
           path: |
@@ -270,7 +270,7 @@ jobs:
 
       - name: Upload Sandboxie x86
         if: github.ref == 'refs/heads/master' && github.event_name != 'pull_request'
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: Sandboxie_x86
           path: |

.github/workflows/test.yml

@@ -91,15 +91,15 @@ jobs:
         run: Installer\get_assets.cmd
 
       - name: Upload installer assets
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: Assets
           path: |
             Installer/Assets/*
           retention-days: 60
 
       - name: Upload Sandboxie x64
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: Sandboxie_x64
           path: |
@@ -175,7 +175,7 @@ jobs:
         run: Installer\merge_builds.cmd
 
       - name: Upload Sandboxie ARM64
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: Sandboxie_ARM64
           path: |
@@ -246,7 +246,7 @@ jobs:
         run: Installer\merge_builds.cmd
 
       - name: Upload Sandboxie x86
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: Sandboxie_x86
           path: |