fix: reference PNG

Signed-off-by: Joscha Feth <joscha@feth.com>

Author: joscha

topics/data-load-tool/index.md

@@ -8,7 +8,7 @@ short_description: A Python library for moving data.
 topic: software
 url: https://dlthub.com
 github_url: https://github.com/dlt-hub/dlt
-logo: dlthub.svg
+logo: dlthub.png
 ---
 dlt is an open-source Python library that loads data from various, often messy data sources into well-structured, live datasets.
 It offers a lightweight interface for extracting data from REST APIs, SQL databases, cloud storage, Python data structures, and many more.