Fix incorrect example in comment about delete operator applied to optional chaining.
@@ -218,7 +218,7 @@ class OptionalChainRewriter {
* * // becomes
* * let tmp0;
* * (tmp0 = a()) == null
- * * ? void 0
+ * * ? true
* * : delete tmp0.b.c?d;
* *
* }</pre>
