(chore) Add Flow testnet (#405)

Author: aditya520

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

@@ -95,6 +95,7 @@ Pyth is currently available on the EVM networks below using Pyth Stable price so
 | Fantom testnet                    | [`0x5744Cbf430D99456a0A8771208b674F27f8EF0Fb`](https://testnet.ftmscan.com/address/0x5744Cbf430D99456a0A8771208b674F27f8EF0Fb)                                               |
 | Filecoin calibration              | [`0xA2aa501b19aff244D90cc15a4Cf739D2725B5729`](https://calibration.filfox.info/en/address/0xA2aa501b19aff244D90cc15a4Cf739D2725B5729)                                        |
 | Flow Previewnet                   | `0x2880aB155794e7179c9eE2e38200202908C17B43`                                                                                                                                 |
+| Flow Testnet                      | [`0x2880aB155794e7179c9eE2e38200202908C17B43`](https://evm-testnet.flowscan.io/address/0x2880aB155794e7179c9eE2e38200202908C17B43)                                           |
 | Fuji (Avalanche testnet)          | [`0x23f0e8FAeE7bbb405E7A7C3d60138FCfd43d7509`](https://testnet.snowtrace.io/address/0x23f0e8FAeE7bbb405E7A7C3d60138FCfd43d7509)                                              |
 | Hedera testnet                    | [`0xa2aa501b19aff244d90cc15a4cf739d2725b5729`](https://hashscan.io/testnet/contract/0.0.3042133)                                                                             |
 | XCHAIN (IDEX) testnet             | [`0x2880aB155794e7179c9eE2e38200202908C17B43`](https://xchain-testnet-explorer.idex.io/address/0x2880aB155794e7179c9eE2e38200202908C17B43)                                   |