lint fixes

Author: FilipStamenkovic

dev-docs/bidders/showheroes.md

@@ -199,11 +199,11 @@ pbjs.que.push(function () {
 
 You can use this example and place in the `hello_world` gpt integration test page
 
-### Endpoint Compression
+## Endpoint Compression
 
 This adapter utilizes gzip compression support built into Prebid.js core. For more information, see [Compression Support for Outgoing Requests](https://docs.prebid.org/dev-docs/bidder-adaptor.html#compression-support-for-outgoing-requests)
 
-#### Disabling Compression
+### Disabling Compression
 
 You can disable gzip compression at the bidder level using `pbjs.setBidderConfig`. Set the `gzipEnabled` value to false: