fix: Flowise icon (#921)

Author: mtrunkat

sources/platform/integrations/index.mdx

@@ -175,7 +175,7 @@ If you are working on an AI/LLM-related project, we recommend you look into the
     <Card
         title="Flowise"
         to="./integrations/flowise"
-        imageUrl="/img/platform/integrations/Flowise.png"
+        imageUrl="/img/platform/integrations/flowise.png"
         smallImage
     />
 </CardGrid>