fix(serial): restores necessary example reference

SuGlider · web-flow · commit d17034e77b87 · 2025-11-10T08:51:59.000-03:00
diff --git a/docs/en/api/serial.rst b/docs/en/api/serial.rst
@@ -647,6 +647,8 @@ Where:
 Example Applications
 ********************
 
+.. _baud-rate-detection-example:
+
 Baud Rate Detection Example:
 
 .. literalinclude:: ../../../libraries/ESP32/examples/Serial/BaudRateDetect_Demo/BaudRateDetect_Demo.ino
