Update index.ts

Author: jnsdls

packages/service-utils/src/node/index.ts

@@ -76,11 +76,11 @@ function getHeader(
   headers: IncomingHttpHeaders | Headers,
   headerName: string,
 ): string | null {
-  return isNodeHeaders(headers)
+ return isNodeHeaders(headers)
     ? Array.isArray(headers[headerName])
       ? (headers[headerName]?.[0] ?? null)
       : (headers[headerName] ?? null)
-    : headers.get(headerName);
+    : headers.get(headerName) ?? null;
 }
 
 export function extractAuthorizationData(