Fix artifact upload to be v4

Author: potiuk

.github/workflows/build.yml

@@ -72,7 +72,7 @@ jobs:
           git commit -m "Regenerated website based on ${GITHUB_SHA} commit" > ../git_commit.log
           git push origin gh-pages
       - name: 🚀 Upload git commit log as artifacts
-        uses: actions/upload-artifact@0b7f8abb1508181956e8e162db84b466c27e18ce  # v3.1.2
+        uses: actions/upload-artifact@v4
         with:
           name: coceu-git-commit-log
           path: './git_commit.log'