docs: fix changsets and format

.changeset/fuzzy-coins-breathe.md

 ---
 "llamaindex": patch
-"@llamaindex/examples": patch
 ---
 
 Added support for accessing Gemini via Vertex AI

.changeset/good-carpets-rhyme.md

 ---
-"llamaindex": minor
+"llamaindex": patch
 ---
 
 Fix text before heading in markdown reader

packages/core/src/agent/anthropic.ts

@@ -39,7 +39,8 @@ export class AnthropicAgent extends AgentRunner<Anthropic> {
   constructor(params: AnthropicAgentParams) {
     super({
       llm:
-        params.llm ?? (Settings.llm instanceof Anthropic
+        params.llm ??
+        (Settings.llm instanceof Anthropic
           ? (Settings.llm as Anthropic)
           : new Anthropic()),
       chatHistory: params.chatHistory ?? [],

packages/core/src/agent/openai.ts

@@ -36,7 +36,8 @@ export class OpenAIAgent extends AgentRunner<OpenAI> {
   constructor(params: OpenAIAgentParams) {
     super({
       llm:
-        params.llm ?? (Settings.llm instanceof OpenAI
+        params.llm ??
+        (Settings.llm instanceof OpenAI
           ? (Settings.llm as OpenAI)
           : new OpenAI()),
       chatHistory: params.chatHistory ?? [],