quic: fix weakly weakup assignment

Author: martenrichter

lib/internal/blob.js

@@ -476,16 +476,14 @@ function createBlobReaderStream(reader) {
       // Lazily register a wakeup callback that the C++ side can invoke
       // when new data is available after a STATUS_BLOCK.
       let immediate;
-      reader.setWakeup(() => {
-        if (this.pendingPulls.length > 0 &&
-          typeof immediate === 'undefined') {
-          // Postpone the execution to the next steps of the event loop
-          immediate = setImmediate(() => {
+      this.wakeup = () => {
+        if (this.pendingPulls.length > 0) {
+          immediate ??= setImmediate(() => {
             immediate = undefined;
             this.readNext(c);
           });
         }
-      });
+      };
     },
     pull(c) {
       const { promise, resolve, reject } = PromiseWithResolvers();