Prevent "Uncaught promise" messages in the console when cancelling (some) ReadableStreams

While fixing issue 13794, I noticed that cancelling the `ReadableStream` returned by the `PDFPageProxy.streamTextContent`-method could lead to "Uncaught promise" messages in the console.[1]
Generally speaking, we don't really care about errors when *cancelling* a `ReadableStream` and it thus seems reasonable to simply suppress any output in those cases.

---
[1] Although, after that issue was fixed you'd now need to set the API-option `stopAtErrors = true` to actually trigger this.

src/display/api.js

@@ -1802,7 +1802,11 @@ class PDFPageProxy {
         return;
       }
     }
-    intentState.streamReader.cancel(new AbortException(reason?.message));
+    intentState.streamReader
+      .cancel(new AbortException(reason?.message))
+      .catch(() => {
+        // Avoid "Uncaught promise" messages in the console.
+      });
     intentState.streamReader = null;
 
     if (this._transport.destroyed) {