fix: (Component WaveshareEPaper) Correct pin number

tests/components/waveshare_epaper/test.esp32-idf.yaml

@@ -123,19 +123,18 @@ display:
       it.rectangle(0, 0, it.get_width(), it.get_height());
   - platform: waveshare_epaper
     model: 4.20in-bv2-bwr
-    spi_id: spi_id_1
     cs_pin:
       allow_other_uses: true
-      number: GPIO25
+      number: 4
     dc_pin:
       allow_other_uses: true
-      number: GPIO26
+      number: 4
     busy_pin:
       allow_other_uses: true
-      number: GPIO27
+      number: 4
     reset_pin:
       allow_other_uses: true
-      number: GPIO32
+      number: 4
     lambda: |-
       auto const red = Color(255, 0, 0);
       it.filled_rectangle(                 0,                   0, it.get_width() / 2,     it.get_height(), COLOR_ON);