fix(st7789): correct degree symbol

Author: tyeth

src/components/display/drivers/dispDrvSt7789.h

@@ -282,7 +282,8 @@ class dispDrvSt7789 : public dispDrvBase {
           i++;
         }
       } else if (message[i] == 0xC2 && message[i + 1] == 0xB0) {
-        _display->write(char(248));
+        // Degree symbol - tested on Feather RevTFT S3
+        _display->write(char(247));
         i++;
       } else {
         _display->print(message[i]);