Fix upload artifact

Author: robkooper

.github/workflows/ci.yml

@@ -177,7 +177,7 @@ jobs:
           done
           rm ${ZIPFILE}
           zip -r ${ZIPFILE} ${DIR}
-      - uses: actions/upload-artifact@v2
+      - uses: actions/upload-artifact@v4
         with:
           name: clowder.zip
           path: target/universal/clowder-*.zip
@@ -248,7 +248,7 @@ jobs:
           VERSION: ${{ env.CLOWDER_VERSION }}
           BUILDNUMBER: ${{ github.run_number }}
           GITSHA1: ${{ github.sha  }}
-      - uses: actions/upload-artifact@v2
+      - uses: actions/upload-artifact@v4
         with:
           name: ScalaDoc
           path: target/scala-*/api/