Bump actions/upload-artifact from 2 to 4 (#224)

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 2 to 4.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v2...v4)

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

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

.github/workflows/checks.yml

@@ -70,14 +70,14 @@ jobs:
 
       - name: Archive test results
         if: ${{ always() }}
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: Unity Test Results ${{ matrix.unityVersion }}
           path: ${{ steps.tests.outputs.artifactsPath }}
 
       - name: Archive coverage results
         if: ${{ always() }}
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: Unity Coverage Results ${{ matrix.unityVersion }}
           path: ${{ steps.tests.outputs.coveragePath }}
@@ -124,7 +124,7 @@ jobs:
 
       - name: Archive test results
         if: ${{ always() }}
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: netstandard Test Results
           path: src/TestResults
@@ -171,7 +171,7 @@ jobs:
 
       - name: Archive ReSharper run
         if: ${{ always() }}
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: ReSharper
           path: src/inspect.xml

.github/workflows/releasables.yml

@@ -21,7 +21,7 @@ jobs:
         run: dotnet pack src --output nupkg
 
       - name: Archive nupkg
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: nupkg
           path: nupkg/*
@@ -52,7 +52,7 @@ jobs:
           customParameters: -disable-assembly-updater
 
       - name: Archive docs
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: Docs
           path: docfx/docs_site

.github/workflows/unity-activation.yml

@@ -12,7 +12,7 @@ jobs:
         uses: game-ci/unity-request-activation-file@v2
       # Upload artifact (Unity_v20XX.X.XXXX.alf)
       - name: Expose as artifact
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4
         with:
           name: ${{ steps.getManualLicenseFile.outputs.filePath }}
           path: ${{ steps.getManualLicenseFile.outputs.filePath }}