Update research-overview.mdx

Adding hyperlink to deliberation question bullet

pages/research/research-overview.mdx

@@ -56,7 +56,7 @@ As we’ve discussed above, experiments are well-suited for a specific type of q
 We’ll continue to update this section as we analyze and publish ongoing studies. Some questions we’re currently studying experimentally include: 
 
 - ***Does a deliberative process increase informed decision-making, social trust, or consensus on a contested topic?***
-    - Link to forum post summary **here**
+    - Link to forum post summary [here](https://gov.optimism.io/t/when-is-deliberation-useful-for-optimism-governance/9142)
     - Link to full academic paper (coming soon!)
 - ***Does a sample of guest voters allocate resources differently than web-of-trust voters? What is the relationship between social graph connections, vote clustering, and survey data on self-dealing and collusion?***
     - Analysis and intervention underway — see forum post on R5 [here](https://gov.optimism.io/t/retro-funding-5-expert-voting-experiment/8613) and R6 [here](https://gov.optimism.io/t/retro-funding-6-announcing-guest-voter-participation/8816/3)