docs(readme): fix https proxy example (#310)

README.md

@@ -326,18 +326,24 @@ If you would like to disable or customize this behavior, for example to use the
 <!-- prettier-ignore -->
 ```ts
 import http from 'http';
-import HttpsProxyAgent from 'https-proxy-agent';
+import { HttpsProxyAgent } from 'https-proxy-agent';
 
 // Configure the default for all requests:
 const anthropic = new Anthropic({
   httpAgent: new HttpsProxyAgent(process.env.PROXY_URL),
+  baseURL: 'http://localhost:8080/test-api',
 });
 
 // Override per-request:
-await anthropic.messages.create({ max_tokens: 1024, messages: [{ role: 'user', content: 'Hello, Claude' }], model: 'claude-3-opus-20240229' }, {
-  baseURL: 'http://localhost:8080/test-api',
-  httpAgent: new http.Agent({ keepAlive: false }),
-})
+await anthropic.messages.create({
+    max_tokens: 1024,
+    messages: [{ role: 'user', content: 'Hello, Claude' }],
+    model: 'claude-3-opus-20240229'
+  },
+  {
+    httpAgent: new http.Agent({ keepAlive: false }),
+  }
+)
 ```
 
 ## Semantic Versioning