build(deps): Bump actions/upload-artifact from 5 to 6 (#352)

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 5 to 6.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v5...v6)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '6'
  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>

Author: dependabot[bot]

.github/workflows/e2e.yml

@@ -79,7 +79,7 @@ jobs:
           go build -tags "static system_libgit2 enable_libgit2"
 
       - name: Upload modctl
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: modctl-artifact
           path: modctl
@@ -110,7 +110,7 @@ jobs:
           hf download ${{ env.MODEL }} --local-dir ${{ env.MODEL_DIR }}
 
       - name: Upload model
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: model-artifact
           path: ${{ env.MODEL_DIR }}

.github/workflows/release.yaml

@@ -125,7 +125,7 @@ jobs:
         nfpm pkg --packager rpm --config hack/nfpm.yaml --target dist/modctl-${TAG}-${{ matrix.goos }}-${{ matrix.goarch }}.rpm
 
     - name: Upload artifacts
-      uses: actions/upload-artifact@v5
+      uses: actions/upload-artifact@v6
       with:
         name: modctl-${{ matrix.goos }}-${{ matrix.goarch }}
         path: dist/