Update README mentioning the new way of executing the examples

Author: SimplyDanny

Examples/README.md

@@ -1,7 +1,10 @@
-# Snippets (Examples)
+# Examples
 
-- Command line tool to add one to every integer literal in a source file [AddOneToIntegerLiterals.swift](AddOneToIntegerLiterals.swift).
-- Code-generate a simple source file using SwiftSyntaxBuilder [CodeGenerationUsingSwiftSyntaxBuilder.swift](CodeGenerationUsingSwiftSyntaxBuilder.swift)
+Each example can be executed by navigating into this folder and running `swift run <example> <arguments>`. There is the following set of examples available:
+
+- [AddOneToIntegerLiterals](AddOneToIntegerLiterals.swift): Command line tool to add 1 to every integer literal in a source file
+- [CodeGenerationUsingSwiftSyntaxBuilder](CodeGenerationUsingSwiftSyntaxBuilder.swift): Code-generate a simple source file using SwiftSyntaxBuilder
+- [MigrateToNewIfLetSyntax](MigrateToNewIfLetSyntax.swift): Command line tool to transform optional bindings in `if` statements to the new shorthand syntax
 
 ## Some Example Usages