chore(deps): update actions/upload-artifact action to v7

Author: renovate[bot]

.github/workflows/build.yml

@@ -37,7 +37,7 @@ jobs:
         run: task test
 
       - name: Upload build artifacts
-        uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6
+        uses: actions/upload-artifact@bbbca2ddaa5d8feaa63e36b76fdaad77386f024f # v7
         with:
           name: mkp-server
           path: build/mkp-server