Updated OCR link

Author: SyedAsadKazmi

src/content/architecture-overview/off-chain-reporting.mdx

@@ -9,7 +9,7 @@ metadata:
 
 import { Aside } from "@components"
 
-Offchain Reporting (OCR) is a significant step towards increasing the decentralization and scalability of Chainlink networks. See the [OCR Protocol Paper](https://research.chain.link/ocr.pdf) for a technical deep dive.
+Offchain Reporting (OCR) is a significant step towards increasing the decentralization and scalability of Chainlink networks. See the [OCR Protocol Paper](https://research.chain.link/ocr3.pdf) for a technical deep dive.
 
 For Offchain Reporting aggregators, all nodes communicate using a peer to peer network. During the communication process, a lightweight consensus algorithm runs where each node reports its data observation and signs it. A single aggregate transaction is then transmitted, which saves a significant amount of gas.