build: update actions/upload-artifact digest to 8448086

Author: angular-robot

github-actions/previews/pack-and-upload-artifact/action.yml

@@ -61,7 +61,7 @@ runs:
         tar -czvf "$pkg" -C '${{steps.copy.outputs.deploy-dir}}' .
         echo "artifact-path=$pkg" >> $GITHUB_OUTPUT
 
-    - uses: actions/upload-artifact@604373da6381bf24206979c74d06a550515601b9 # v4
+    - uses: actions/upload-artifact@84480863f228bb9747b473957fcc9e309aa96097 # v4
       with:
         name: '${{inputs.workflow-artifact-name}}'
         path: '${{steps.pack.outputs.artifact-path}}'