docs: restore intro sentence in Crawlee guide

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: vdusek

docs/03_guides/05_crawlee.mdx

@@ -10,6 +10,8 @@ import CrawleeBeautifulSoupExample from '!!raw-loader!roa-loader!./code/05_crawl
 import CrawleeParselExample from '!!raw-loader!roa-loader!./code/05_crawlee_parsel.py';
 import CrawleePlaywrightExample from '!!raw-loader!roa-loader!./code/05_crawlee_playwright.py';
 
+In this guide, you'll learn how to use the [Crawlee](https://crawlee.dev/python) library in your Apify Actors.
+
 ## Introduction
 
 [Crawlee](https://crawlee.dev/python) is a Python library for web scraping and browser automation that provides a robust and flexible framework for building web scraping tasks. It seamlessly integrates with the Apify platform and supports a variety of scraping techniques, from static HTML parsing to dynamic JavaScript-rendered content handling. Crawlee offers a range of crawlers, including HTTP-based crawlers like [`HttpCrawler`](https://crawlee.dev/python/api/class/HttpCrawler), [`BeautifulSoupCrawler`](https://crawlee.dev/python/api/class/BeautifulSoupCrawler) and [`ParselCrawler`](https://crawlee.dev/python/api/class/ParselCrawler), and browser-based crawlers like [`PlaywrightCrawler`](https://crawlee.dev/python/api/class/PlaywrightCrawler), to suit different scraping needs.