chore(docs): use client instead of package name in Node examples (#469)

Author: stainless-app[bot]

README.md

@@ -20,7 +20,7 @@ The full API of this library can be found in [api.md](api.md).
 ```js
 import Anthropic from '@anthropic-ai/sdk';
 
-const anthropic = new Anthropic({
+const client = new Anthropic({
   apiKey: process.env['ANTHROPIC_API_KEY'], // This is the default and can be omitted
 });
 
@@ -44,7 +44,7 @@ We provide support for streaming responses using Server Sent Events (SSE).
 ```ts
 import Anthropic from '@anthropic-ai/sdk';
 
-const anthropic = new Anthropic();
+const client = new Anthropic();
 
 const stream = await anthropic.messages.create({
   max_tokens: 1024,
@@ -68,7 +68,7 @@ This library includes TypeScript definitions for all request params and response
 ```ts
 import Anthropic from '@anthropic-ai/sdk';
 
-const anthropic = new Anthropic({
+const client = new Anthropic({
   apiKey: process.env['ANTHROPIC_API_KEY'], // This is the default and can be omitted
 });
 
@@ -193,7 +193,7 @@ You can use the `maxRetries` option to configure or disable this:
 <!-- prettier-ignore -->
 ```js
 // Configure the default for all requests:
-const anthropic = new Anthropic({
+const client = new Anthropic({
   maxRetries: 0, // default is 2
 });
 
@@ -210,7 +210,7 @@ Requests time out after 10 minutes by default. You can configure this with a `ti
 <!-- prettier-ignore -->
 ```ts
 // Configure the default for all requests:
-const anthropic = new Anthropic({
+const client = new Anthropic({
   timeout: 20 * 1000, // 20 seconds (default is 10 minutes)
 });
 
@@ -235,7 +235,7 @@ Be aware that doing so may result in incorrect types and other unexpected or und
 ```ts
 import Anthropic from '@anthropic-ai/sdk';
 
-const anthropic = new Anthropic();
+const client = new Anthropic();
 
 const message = await anthropic.messages.create(
   {
@@ -257,7 +257,7 @@ You can also use the `.withResponse()` method to get the raw `Response` along wi
 
 <!-- prettier-ignore -->
 ```ts
-const anthropic = new Anthropic();
+const client = new Anthropic();
 
 const response = await anthropic.messages
   .create({
@@ -376,7 +376,7 @@ import http from 'http';
 import { HttpsProxyAgent } from 'https-proxy-agent';
 
 // Configure the default for all requests:
-const anthropic = new Anthropic({
+const client = new Anthropic({
   httpAgent: new HttpsProxyAgent(process.env.PROXY_URL),
 });