Merge pull request #1150 from NLGithubWP/dev-postgresql

Update README.md

Author: chrishkchris

examples/model_selection/Trails/README.md

@@ -23,7 +23,7 @@
 ![image-20230702035806963](documents/ai_db.001.jpeg)
 
 
-# Build & Run examples
+# Build & Run examples:
 
 ## Singa + PostgreSQL