removed directory

Author: d47853

.github/workflows/release.yaml

@@ -184,8 +184,9 @@ jobs:
 
     - name: Update repo
       run: |
-        cp artifacts/*/*.tgz .
+        mv artifacts/*/*.tgz .
         helm repo index . --url "https://github.com/gchq/gaffer-docker/releases/download/${{ github.event.milestone.title }}"
         rm *.tgz
+        rm -r artifacts
         git commit -am "Updated index.yaml"
         git push