fix more tests

Author: mikeldking

js/packages/openinference-instrumentation-langchain/test/langchainV3.test.ts

@@ -245,10 +245,14 @@ describe("LangChainInstrumentation", () => {
 
     await chatModel.invoke("hello, this is a test");
 
-    const span = memoryExporter.getFinishedSpans()[0];
-    expect(span).toBeDefined();
+    const spans = memoryExporter.getFinishedSpans();
+    const llmSpan = spans.find(
+      (span) =>
+        span.attributes[OPENINFERENCE_SPAN_KIND] === OpenInferenceSpanKind.LLM,
+    );
+    expect(llmSpan).toBeDefined();
 
-    expect(span.attributes).toStrictEqual({
+    expect(llmSpan?.attributes).toStrictEqual({
       ...expectedSpanAttributes,
       [LLM_INVOCATION_PARAMETERS]:
         '{"model":"gpt-3.5-turbo","temperature":0,"top_p":1,"frequency_penalty":0,"presence_penalty":0,"n":1,"stream":false}',