Update evm.mdx (#580)

add abstract mainnet PF

Author: KemarTiti

pages/price-feeds/contract-addresses/evm.mdx

@@ -6,6 +6,7 @@ Pyth is currently available on the EVM networks below using Pyth Stable price so
 
 | Network               | Contract address                                                                                                                             |
 | --------------------- | -------------------------------------------------------------------------------------------------------------------------------------------- |
+| Abstract              | [`0x8739d5024B5143278E2b15Bd9e7C26f6CEc658F1`](https://abscan.org/address/0x8739d5024B5143278E2b15Bd9e7C26f6CEc658F1)                        |
 | Apechain              | [`0x2880aB155794e7179c9eE2e38200202908C17B43`](https://apechain.calderaexplorer.xyz/address/0x2880aB155794e7179c9eE2e38200202908C17B43)      |
 | Arbitrum              | [`0xff1a0f4744e8582DF1aE09D5611b887B6a12925C`](https://arbiscan.io/address/0xff1a0f4744e8582df1ae09d5611b887b6a12925c)                       |
 | Astar zkEVM           | [`0xA2aa501b19aff244D90cc15a4Cf739D2725B5729`](https://astar-zkevm.explorer.startale.com/address/0xA2aa501b19aff244D90cc15a4Cf739D2725B5729) |