Bump actions/upload-artifact from 3 to 4 (#111)

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

.github/workflows/pr_build.yaml

@@ -160,7 +160,7 @@ jobs:
       - name: Build images
         run: make build
       - name: Archive image
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: spiffe-helper
           path: spiffe-helper

.github/workflows/release_build.yaml

@@ -61,7 +61,7 @@ jobs:
       - name: Compress artifact
         run: tar -czvf spiffe-helper-${{ github.ref_name }}.tar.gz spiffe-helper
       - name: Archive artifact
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: spiffe-helper
           path: spiffe-helper-${{ github.ref_name }}.tar.gz