Fix broken example link

Author: fhessel

README.md

@@ -37,7 +37,7 @@ You will find several examples showing how you can use the library:
 - [Async-Server](examples/Async-Server/Async-Server.ino): Like the Static-Page example, but the server runs in a separate task on the ESP32, so you do not need to call the loop() function in your main sketch.
 - [Websocket-Chat](examples/Websocket-Chat/Websocket-Chat.ino): Provides a browser-based chat built on top of websockets. **Note:** Websockets are still under development!
 - [Parameter-Validation](examples/Parameter-Validation/Parameter-Validation.ino): Shows how you can integrate validator functions to do formal checks on parameters in your URL.
-- [Self-Signed-Certificate](examples/Self-Signed/Self-Signed.ino): Shows how to generate a self-signed certificate on the fly on the ESP when the sketch starts. You do not need to run `create_cert.sh` to use this example.
+- [Self-Signed-Certificate](examples/Self-Signed-Certificate/Self-Signed-Certificate.ino): Shows how to generate a self-signed certificate on the fly on the ESP when the sketch starts. You do not need to run `create_cert.sh` to use this example.
 
 If you encounter error messages that cert.h or private\_key.h are missing when running an example, make sure to run create\_cert.sh first (see Setup Instructions).