update model name in these for making them eligible for multimodality

examples/src/models/chat/integration_googlevertexai-streaming.ts

@@ -4,6 +4,7 @@ import { ChatVertexAI } from "@langchain/google-vertexai";
 
 const model = new ChatVertexAI({
   temperature: 0.7,
+  model: "gemini-1.5-flash-001",
 });
 const stream = await model.stream([
   ["system", "You are a funny assistant that answers in pirate language."],

examples/src/models/chat/integration_googlevertexai-tools.ts

@@ -25,7 +25,7 @@ const geminiCalculatorTool: GeminiTool = {
 
 const model = new ChatVertexAI({
   temperature: 0.7,
-  model: "gemini-1.0-pro",
+  model: "gemini-1.5-flash-001",
 }).bind({
   tools: [geminiCalculatorTool],
 });

examples/src/models/chat/integration_googlevertexai-wsa.ts

@@ -13,7 +13,7 @@ const calculatorSchema = z.object({
 
 const model = new ChatVertexAI({
   temperature: 0.7,
-  model: "gemini-1.0-pro",
+  model: "gemini-1.5-flash-001",
 }).withStructuredOutput(calculatorSchema);
 
 const response = await model.invoke("What is 1628253239 times 81623836?");

examples/src/models/chat/integration_googlevertexai.ts

@@ -4,7 +4,7 @@ import { ChatVertexAI } from "@langchain/google-vertexai";
 
 const model = new ChatVertexAI({
   temperature: 0.7,
-  model: "gemini-1.0-pro",
+  model: "gemini-1.5-flash-001",
 });
 
 const response = await model.invoke("Why is the ocean blue?");