Update README.md

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
Signed-off-by: Woojin Wie <[email protected]>

Author: Woojin-Crive

README.md

@@ -71,7 +71,7 @@ These parameters define how the interface communicates with the Dynamixel motors
 
 - **`baud_rate`**: Communication baud rate.
 
-- **`error_timeout_ms`**: Timeout for communication errors.
+- **`error_timeout_ms`**: Timeout for communication errors (in milliseconds).
 
 #### **2. Hardware Configuration**