Fix typos in es5.d.ts (microsoft#46321)

Author: we-ai

src/lib/es5.d.ts

@@ -196,13 +196,13 @@ interface ObjectConstructor {
 
     /**
      * Prevents the modification of existing property attributes and values, and prevents the addition of new properties.
-     * @param o Object on which to lock the attributes.
+     * @param a Object on which to lock the attributes.
      */
     freeze<T>(a: T[]): readonly T[];
 
     /**
      * Prevents the modification of existing property attributes and values, and prevents the addition of new properties.
-     * @param o Object on which to lock the attributes.
+     * @param f Object on which to lock the attributes.
      */
     freeze<T extends Function>(f: T): T;