Update imports in index.md (#1018)

docs/index.md

@@ -56,7 +56,7 @@ See the following code samples for a concrete idea of how to use these capabilit
 - {Basic generation}
 
  ```javascript
- import { generate } from `@genkit-ai/ai`;
+ import { generate } from '@genkit-ai/ai';
  import { gemini15Flash, claude3Sonnet, llama31 } from '@genkit-ai/vertexai';
  import { gpt4o } from 'genkitx-openai';
 
@@ -70,9 +70,9 @@ See the following code samples for a concrete idea of how to use these capabilit
 - {Structured generation}
 
  ```javascript
- import { generate } from `@genkit-ai/ai`;
- import { gemini15Flash } from `@genkit-ai/googleai`;
- import { z } from `zod`;
+ import { generate } from '@genkit-ai/ai';
+ import { gemini15Flash } from '@genkit-ai/googleai';
+ import { z } from 'zod';
 
  const result = await generate({
  model: gemini15Flash,
@@ -95,9 +95,9 @@ See the following code samples for a concrete idea of how to use these capabilit
 - {Tool calling}
 
  ```javascript
- import { generate, defineTool } from `@genkit-ai/ai`;
- import { gemini15Flash } from `@genkit-ai/googleai`;
- import { z } from `zod`;
+ import { generate, defineTool } from '@genkit-ai/ai';
+ import { gemini15Flash } from '@genkit-ai/googleai';
+ import { z } from 'zod';
 
  // Define tool to get weather data for a given location
  const lookupWeather = defineTool({
@@ -126,9 +126,9 @@ See the following code samples for a concrete idea of how to use these capabilit
 - {Retrieval}
 
  ```javascript
- import { generate, retrieve } from `@genkit-ai/ai`;
+ import { generate, retrieve } from '@genkit-ai/ai';
  import { devLocalRetrieverRef } from '@genkit-ai/dev-local-vectorstore';
- import { gemini15Flash } from `@genkit-ai/googleai`;
+ import { gemini15Flash } from '@genkit-ai/googleai';
 
  // Sample assumes Genkit documentation has been chunked, stored, and indexed in 
  // local vectorstore in previous step.