crypto: fix comment in ByteSource

PR-URL: #35972
Refs: #35821
Reviewed-By: Daniel Bevenius <daniel.bevenius@gmail.com>
Reviewed-By: Zeyu Yang <himself65@outlook.com>
Reviewed-By: David Carlier <devnexen@gmail.com>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
Reviewed-By: Ricky Zhou <0x19951125@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

src/crypto/crypto_util.cc

@@ -237,7 +237,7 @@ ByteSource& ByteSource::operator=(ByteSource&& other) noexcept {
 
 std::unique_ptr<BackingStore> ByteSource::ReleaseToBackingStore() {
   // It's ok for allocated_data_ to be nullptr but
-  // only if size_ is not zero.
+  // only if size_ is zero.
   CHECK_IMPLIES(size_ > 0, allocated_data_ != nullptr);
   std::unique_ptr<BackingStore> ptr = ArrayBuffer::NewBackingStore(
       allocated_data_,