Add hint line under hero CTA table noting badges are clickable

README.md

@@ -43,6 +43,8 @@ short_description: Guarded RAG support navigator for UMD students
 |:--------------------:|:-------------------:|:---------------------:|:----------------------:|
 | Hands-on on HF Space | 5-min walkthrough across 4 scenarios | 10-min recorded MSML641 talk | Slide deck + both videos in one folder |
 
+<sub>*Click any badge above to open the resource in a new tab.*</sub>
+
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