build(deps): 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>

.github/workflows/apidiff.yml

@@ -29,7 +29,7 @@ jobs:
           echo '{"id": ${{ github.event.pull_request.number }}, "semver-type": "${{ steps.apidiff.outputs.semver-type }}"}' > apidiff.json
 
       - name: Upload apidiff.json
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: apidiff
           path: apidiff.json

.github/workflows/ci.yml

@@ -128,7 +128,7 @@ jobs:
 
       - name: Upload Test Results
         if: always()
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: Test Results (previous stable Go)
           path: junit.xml
@@ -156,7 +156,7 @@ jobs:
 
       - name: Upload Test Results
         if: always()
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: Test Results (arm64)
           path: junit.xml
@@ -193,7 +193,7 @@ jobs:
 
       - name: Upload Test Results
         if: always()
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: Test Results (${{ matrix.version }})
           path: junit.xml