docs: fix JS quickstart (#2406)

## Description

Response is being re-assigned

## PR Checklist

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- [ ] Make sure you reviewed

[CONTRIBUTING.md](https://github.com/googleapis/genai-toolbox/blob/main/CONTRIBUTING.md)
- [ ] Make sure to open an issue as a

[bug/issue](https://github.com/googleapis/genai-toolbox/issues/new/choose)
  before writing your code! That way we can discuss the change, evaluate
  designs, and agree on the general idea
- [ ] Ensure the tests and linter pass
- [ ] Code coverage does not decrease (if any source code was changed)
- [ ] Appropriate docs were updated (if necessary)
- [ ] Make sure to add `!` if this involve a breaking change

🛠️ Fixes #<issue_number_goes_here>

docs/en/getting-started/quickstart/js/genkit/quickstart.js

@@ -53,7 +53,7 @@ export async function main() {
 
   for (const query of queries) {
     conversationHistory.push({ role: "user", content: [{ text: query }] });
-    const response = await ai.generate({
+    let response = await ai.generate({
       messages: conversationHistory,
       tools: tools,
     });

docs/en/how-to/invoke_tool.md

@@ -13,12 +13,12 @@ The `invoke` command allows you to invoke tools defined in your configuration di
 
 {{< notice tip >}}
 **Keep configurations minimal:** The `invoke` command initializes *all* resources (sources, tools, etc.) defined in your configuration files during execution. To ensure fast response times, consider using a minimal configuration file containing only the tools you need for the specific invocation.
-{{< notice tip >}}
+{{< /notice >}}
 
-## Prerequisites
+## Before you begin
 
-- You have the `toolbox` binary installed or built.
+1. Make sure you have the `toolbox` binary installed or built.
-- You have a valid tool configuration file (e.g., `tools.yaml`).
+2. Make sure you have a valid tool configuration file (e.g., `tools.yaml`).
 
 ## Basic Usage
 

docs/en/reference/prebuilt-tools.md

@@ -414,10 +414,10 @@ See [Usage Examples](../reference/cli.md#examples).
         entries.
     *   **Dataplex Editor** (`roles/dataplex.editor`) to modify entries.
 *   **Tools:**
-    *   `dataplex_search_entries`: Searches for entries in Dataplex Catalog.
+    *   `search_entries`: Searches for entries in Dataplex Catalog.
-    *   `dataplex_lookup_entry`: Retrieves a specific entry from Dataplex
+    *   `lookup_entry`: Retrieves a specific entry from Dataplex
         Catalog.
-    *   `dataplex_search_aspect_types`: Finds aspect types relevant to the
+    *   `search_aspect_types`: Finds aspect types relevant to the
         query.
 
 ## Firestore