Fix comment

Gt => Greater than => `>`
Ge => Greater equal => `>=`

Author: brian030128

Diff for: compiler/rustc_ast/src/token.rs

@@ -238,9 +238,9 @@ pub enum TokenKind {
     EqEq,
     /// `!=`
     Ne,
-    /// `>`
-    Ge,
     /// `>=`
+    Ge,
+    /// `>`
     Gt,
     /// `&&`
     AndAnd,