Update base_layer/core/src/base_node/sync/header_sync/synchronizer.rs

Spelling error

base_layer/core/src/base_node/sync/header_sync/synchronizer.rs

@@ -459,7 +459,7 @@ impl<'a, B: BlockchainBackend + 'static> HeaderSynchronizer<'a, B> {
             .map(BlockHeader::try_from)
             .collect::<Result<Vec<_>, _>>()
             .map_err(BlockHeaderSyncError::ReceivedInvalidHeader)?;
-        let num_new_headers = headers.len(); // Required fro later use, no 'Copy' trait on 'BlockHeader'
+        let num_new_headers = headers.len(); // Required for later use, no 'Copy' trait on 'BlockHeader'
 
         // NOTE: We can trust that the header associated with this hash exists because `block_hashes` was supplied by
         // this node. Bounds checking for fork_hash_index has been done above.