Update simple-crawling.md

Fixing wrong documentation about th fit_markdown to assume its a direct parameter of CrawlerRunConfig, while it is NOT.

docs/md_v2/core/simple-crawling.md

@@ -31,9 +31,16 @@ if __name__ == "__main__":
 The `arun()` method returns a `CrawlResult` object with several useful properties. Here's a quick overview (see [CrawlResult](../api/crawl-result.md) for complete details):
 
 ```python
+config = CrawlerRunConfig(
+    markdown_generator=DefaultMarkdownGenerator(
+        content_filter=PruningContentFilter(threshold=0.6),
+        options={"ignore_links": True}
+    )
+)
+
 result = await crawler.arun(
     url="https://example.com",
-    config=CrawlerRunConfig(fit_markdown=True)
+    config=config
 )
 
 # Different content formats