Tests: Update assertion for auto-detection in dependencies test

With auto-detection, print_script_module_translations() iterates every
enqueued module and its dependencies, so the
load_script_textdomain_relative_path filter now fires for both the
main module and its dependency rather than only for the dependency
that had set_translations() called on it.

Author: manzoorwanijk

tests/phpunit/tests/script-modules/wpScriptModules.php

@@ -2800,7 +2800,8 @@ static function ( $relative, $src, $is_module ) use ( &$filtered ) {
 
 		$output = get_echo( array( $this->script_modules, 'print_script_module_translations' ) );
 
-		$this->assertCount( 1, $filtered );
+		// With auto-detection, the filter fires for every enqueued module and its dependencies.
+		$this->assertCount( 2, $filtered );
 		foreach ( $filtered as $filter_args ) {
 			$this->assertIsString( $filter_args['relative'] );
 			$this->assertIsString( $filter_args['src'] );