fix links in previous commits

src/data/roadmaps/java/content/lifecycle-of-a-program@QgWalJLIb6Fw0HhN1wb02.md

@@ -6,4 +6,4 @@ Visit the following resources to learn more:
 
 - [@article@Life Cycle of a Java Program](https://www.startertutorials.com/corejava/life-cycle-java-program.html)
 - [@article@How the JVM Executes Java Code](https://www.cesarsotovalero.net/blog/how-the-jvm-executes-java-code.html)
-- [@article@Stack Тrace by Hyperskill (JetBrains Academy)](https://www.cesarsotovalero.net/blog/how-the-jvm-executes-java-code.html)
+- [@article@Stack Тrace by Hyperskill (JetBrains Academy)](https://hyperskill.org/learn/step/17477)

src/data/roadmaps/java/content/regular-expressions@C7rB3jkshHFN7TkHRJPlz.md

@@ -5,4 +5,4 @@ Regular expressions, often shortened to "regex," are sequences of characters tha
 Visit the following resources to learn more:
 
 - [@article@Java Regular Expressions Tutorial](https://jenkov.com/tutorials/java-regex/index.html)
-- [@article@Regex Sets, Ranges, Alternations by Hyperskill (JetBrains Academy)](https://jenkov.com/tutorials/java-regex/index.html)
+- [@article@Regex Sets, Ranges, Alternations by Hyperskill (JetBrains Academy)](https://hyperskill.org/learn/step/3674)