Update 1.x_to2.x_migration_guide.md

Author: qfisch

docs/1.x_to2.x_migration_guide.md

@@ -55,7 +55,7 @@ The default address type is public `0`, whereas many devices use a random `1` ad
 If you experience this issue please create your address instances with the address type specified, i.e. `NimBLEAddress address("11:22:33:44:55:66", TYPE_HERE)`
 
 `NimBLEAddress::getNative` has been removed and replaced with `NimBLEAddress::getBase`.
-This returns a pointer to `const ble_addr_t` instead of a pointer to the address value that `getNative` did. The value can be accessed through this struct via `ble_addr_t.value` and type is in `ble_addr_t.type`.  
+This returns a pointer to `const ble_addr_t` instead of a pointer to the address value that `getNative` did. The value can be accessed through this struct via `ble_addr_t.val` and type is in `ble_addr_t.type`.  
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 ## BLE UUID's