chore: add comment on cancel

Author: vasco-santos

src/handler.js

@@ -203,6 +203,7 @@ async function batchResponse ({ blocks, context, logger }) {
         telemetry.increaseLabelCount('bitswap-block-success-cancel', [block.type])
         telemetry.increaseLabelCount('bitswap-cancel-size', [block.type], size)
 
+        console.log('delete', block.key)
         context.canceled.delete(block.key)
       }
     }