rename check-news-items to check-news-item

Author: bobleesj

.github/workflows/check-news-item.yml

@@ -6,7 +6,7 @@ on:
     - main
 
 jobs:
-  check-news-items:
+  check-news-item:
     uses: Billingegroup/release-scripts/.github/workflows/_check-news-item.yml@v0
     with:
       project: diffpy.utils