Derives timestamp buffer size from BigUint64Array instead of BigInt64Array (#30290)

* use u64a

* 'ci'

src/renderers/webgpu/WebGPUBackend.js

@@ -1501,7 +1501,7 @@ class WebGPUBackend extends Backend {
 		const renderContextData = this.get( renderContext );
 
 
-		const size = 2 * BigInt64Array.BYTES_PER_ELEMENT;
+		const size = 2 * BigUint64Array.BYTES_PER_ELEMENT;
 
 		if ( renderContextData.currentTimestampQueryBuffers === undefined ) {