Added trust me project and bumped java to 21

trust-me/README.md

@@ -6,7 +6,7 @@ It might occur that your truststore has outdated certificates and is not easy to
 This option demonstrates how to integrate it in your GUI app, and it will prompt when the certificate is not trusted yet, which gives the option to the end-user to either trust or reject it.
 
 ## Demo
-![alt text](https://github.com/Hakky54/java-tutorials/blob/main/trust-me/blob/master/images/demo.gif?raw=true)
+![alt text](https://github.com/Hakky54/java-tutorials/blob/main/trust-me/images/demo.gif?raw=true)
 
 ## Running locally