Merge pull request #251 from scroll-tech/isabellewei/safe-transition

Add info on Safe transition

src/content/docs/en/developers/scroll-contracts.mdx

@@ -102,7 +102,14 @@ Use the table below to configure your Ethereum tools to the Scroll mainnet.
 
 ### Safe
 
-You can access Safe on Scroll [here](https://safe.scroll.xyz/), and the transaction service API is at	https://transaction.safe.scroll.xyz.
+Scroll is available in the [official Safe app](app.safe.global), and the transaction service API is at https://safe-transaction-scroll.safe.global/. 
+<Aside type="caution" title="Safe transition">
+Scroll Mainnet will not be supported on [safe.scroll.xyz](safe.scroll.xyz) after June 20th! 
+Created safes are automatically available in the official app, but local data (address book, settings, and variables) needs to be manually transferred over, using the Export/Import functionality [here](https://safe.scroll.xyz/settings/data).
+Also, if you have unfinished transactions on Mainnet here, please finalize them before June 20th!
+</Aside>
+
+
 
 - CompatibilityFallbackHandler:	[`0xf48f2B2d2a534e402487b3ee7C18c33Aec0Fe5e4`](https://scrollscan.com/address/0xf48f2B2d2a534e402487b3ee7C18c33Aec0Fe5e4)
 - CreateCall:	[`0x7cbB62EaA69F79e6873cD1ecB2392971036cFAa4`](https://scrollscan.com/address/0x7cbB62EaA69F79e6873cD1ecB2392971036cFAa4)