Merge pull request #1547 from trianglesphere/patch-4

Update upgrade-13.mdx

Author: sbvegan

pages/notices/upgrade-13.mdx

@@ -24,7 +24,7 @@ import { Steps, Callout } from 'nextra/components'
 
   *   OP Sepolia, Ink Sepolia, and Minato Sepolia are executing their upgrades **March 21st**
   *   OP Mainnet, Ink Mainnet, and Soneium Mainnet are expected to have Upgrade 13 executed on **April 2nd**. 
-  *   Unichain Sepolia is executing its upgrade on **April 2nd**.
+  *   Unichain Sepolia is executing its upgrade on **April 1nd**.
   *   Unichain Mainnet is executing its upgrade on **April 8th**.
   *   Other Optimism governed chains' upgrades will be tracked in the release management project board.
 </Callout>