Update _index.md

Signed-off-by: Naman Verma <149177973+Namanv0509@users.noreply.github.com>

Author: Namanv0509

content/challenges/d011fd20-a3f5-4480-883b-dfb34321d168/processing-log-data-with-fluent-bit-and-wasm/_index.md

@@ -3,7 +3,7 @@ type: "challenge"
 title: "Processing Log Data with Fluent Bit and WebAssembly"
 description: "Extending Fluent Bit’s Processing Capabilities with WebAssembly"
 weight: 3
-banner: "WebAssembly_Logo.svg"
+banner: "webAssembly-logo.png"
 id: "ebe54b58-969a-46b4-a044-8999ee25fac2"
 categories: "Webassembly"
----
+---