ci: fix deprecation of set-output in github workflows

.github/workflows/integration-test.yaml

@@ -52,7 +52,7 @@ jobs:
               | yq e --output-format=json '.' - \
               | jq '{"include": map( . | select(.dont_run_on_ref != "${{ github.ref }}" ))}'
           )
-          echo ::set-output name=matrix::$(echo "$matrix_post_filter")
+          echo "matrix::$matrix_post_filter" >> $GITHUB_OUTPUT
 
           echo "The subsequent job's matrix are:"
           echo $matrix_post_filter | jq '.'