ci/cd(deps): bump actions/upload-artifact from 4.0.0 to 6.0.0

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 4.0.0 to 6.0.0.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v4.0.0...v6.0.0)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: 6.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/cd.docs.cfp.yml

@@ -44,7 +44,7 @@ jobs:
       - name: Build documentation
         run: ./Taskfile docs publish
       - name: Upload documentation
-        uses: actions/upload-artifact@v4.0.0
+        uses: actions/upload-artifact@v6.0.0
         with:
           name: dist
           path: docs/dist

.github/workflows/ci.yml

@@ -96,7 +96,7 @@ jobs:
         run: make test-with-coverage
         if: matrix.go == '1.21.x'
       - name: Store code coverage report
-        uses: actions/upload-artifact@v4.0.0
+        uses: actions/upload-artifact@v6.0.0
         if: matrix.go == '1.21.x'
         with: { name: code-coverage-report, path: c.out }