fix: fix fatal error

CHANGELOG.md

+## [1.7.3] - 2022-05-19
+### Fixed
+- Fixed syntax error in file.
+
 ## [1.7.2] - 2022-05-18
 ### Fixed
 - Fixed no handler actually assigned when using combination of NullHandler and actual one

src/WC/WooCommerceHandler.php

@@ -26,7 +26,7 @@ class WooCommerceHandler extends AbstractProcessingHandler {
 	protected function write( array $record ) {
 		$context = array_merge(
 			[
-				'source' => $this->channel;,
+				'source' => $this->channel,
 			],
 			$record['extra'],
 			$record['context']