Sync tutorials' Table Of Contents (#5445)

* Sync Table Of Contents

Add missing "Selenium" heading section to Table Of Contents (TOC)

* Sync Table Of Contents

Fix CI/CD error about link order

more/free-programming-interactive-tutorials-en.md

@@ -38,6 +38,7 @@
 * [Ruby](#ruby)
 * [Rust](#rust)
 * [Scala](#scala)
+* [Selenium](#selenium)
 * [SQL](#sql)
 * [Vim](#vim)