doc: boards: wiznet: Use product name for `full_name` in board.yml

Use `W5500-EVB_Pico` - the commercial name of this board - for
`full_name` field of `board.yml`.

Signed-off-by: TOKITA Hiroshi <tokita.hiroshi@gmail.com>

boards/wiznet/w5500_evb_pico/board.yml

diff --git a/boards/wiznet/w5500_evb_pico/board.yml b/boards/wiznet/w5500_evb_pico/board.yml
index eb4eed6..e80be18 100644
--- a/boards/wiznet/w5500_evb_pico/board.yml
+++ b/boards/wiznet/w5500_evb_pico/board.yml
@@ -1,6 +1,6 @@
 board:
   name: w5500_evb_pico
-  full_name: W5500 Evaluation Pico
+  full_name: W5500-EVB-Pico
   vendor: wiznet
   socs:
   - name: rp2040