Update evm.mdx (#601)

add usdtb nav

Author: KemarTiti

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

@@ -26,6 +26,7 @@ Update Parameters: **1 hour heartbeat or 2% price deviation**
 | PYTH/USD   | `0bbf28e9a841a1cc788f6a361b17ca072d0ea3098a1e5df1c3922d06719579ff` |
 | USR/USD    | `10b013adec14c0fe839ca0fe54cec9e4d0b6c1585ac6d7e70010dac015e57f9c` |
 | WSTUSR/USR | `b74c2bc175c2dab850ce5a5451608501c293fe8410cb4aba7449dd1c355ab706` |
+| USDTB/NAV  | `967549f1ff4869f41cb354a7116b9e5a9a3091bebe0b2640eeed745ca1f7f90b` |
 
 ## Base Mainnet