fix: update outdated content

src/content/docs/reference/services.mdx

@@ -18,15 +18,15 @@ These methods are called by the Volar language server when it needs to perform a
 ```ts title="service.ts"
 export const service = {
 	name: 'my-service', // The name of the service, this is used to identify the service in the logs and in Volar Labs
-	create(context): ServicePluginInstance {
+	create(context): LanguageServicePluginInstance {
 		return {
 			provideHover(document, position, token) {
 				// Implement hover support here
 			},
 			// More methods...
 		};
 	},
-} satisfies ServicePlugin;
+} satisfies LanguageServicePlugin;
 ```
 
 ## Using a service
@@ -37,7 +37,7 @@ When initializing the language server, the list of services to use is passed as
 import {
   createConnection,
   createServer,
-  createSimpleProjectProviderFactory,
+  createSimpleProject,
 } from "@volar/language-server/node";
 import { service } from "./service";
 
@@ -46,13 +46,12 @@ const server = createServer(connection);
 
 connection.listen();
 
+function getLanguageServicePlugins() {
+  return [service];
+}
+
 connection.onInitialize((params) => {
-  return server.initialize(params, createSimpleProjectProviderFactory(), {
-    // ...
-    getServicePlugins() {
-      return [service];
-    },
-  });
+  return server.initialize(params, createSimpleProject(), getLanguageServicePlugins());
 });
 
 connection.onInitialized(() => {
@@ -79,7 +78,7 @@ import { CompletionItemKind } from '@volar/language-server';
 
 export const service = {
 	name: 'my-service',
-	create(context): ServicePluginInstance {
+	create(context): LanguageServicePluginInstance {
 		return {
 			provideCompletionItems(document, position, token) {
 				return {
@@ -100,7 +99,7 @@ export const service = {
 			},
 		};
 	},
-} satisfies ServicePlugin;
+} satisfies LanguageServicePlugin;
 ```
 
 ### `resolveCompletionItem`