update sponsored feeds list

Author: mariobern

pages/price-feeds/sponsored-feeds/evm.mdx

@@ -27,6 +27,8 @@ The following EVM chains have sponsored price feeds:
 - [Optimism Sepolia](#optimism-sepolia)
 - [Unichain Sepolia](#unichain-sepolia)
 
+## Feeds removed from the Sponsored List will be displayed [here](https://dev-forum.pyth.network/t/upcoming-changes-to-pyth-sponsored-feeds-effective-august-31-2025/360), effective Aug 31, 2025.
+
 ## Arbitrum Mainnet
 
 <SponsoredFeedsTable feeds={arbitrumMainnet} networkName="Arbitrum mainnet" />

pages/price-feeds/sponsored-feeds/solana.mdx

@@ -3,7 +3,8 @@ import solanaMainnet from "../sponsored-feeds/data/svm/solana_mainnet.json";
 
 # Sponsored Feeds on Solana
 
-## Solana Mainnet
+## Solana Mainnet - feeds removed from the Sponsored List will be displayed [here](https://dev-forum.pyth.network/t/upcoming-changes-to-pyth-sponsored-feeds-effective-august-31-2025/360), effective Aug 31, 2025.
+
 
 <SponsoredFeedsTable
   feeds={solanaMainnet}