fix tests [no_release] (#29)

* fix tests [no_release]

## Checklist
- [NA] I have understood, reviewed, and tested all AI outputs before use
- [NA] All AI instructions respect security, IP, and privacy rules

* PHPStan logging fix

---------

Co-authored-by: James Hill <james-hill-matomo@users.noreply.github.com>

Author: james-hill-matomo

Slack.php

@@ -302,9 +302,11 @@ public function sendReport(
         // Safeguard against sending the same report twice to the same Slack channel (unless $force is true)
         if (!$force && $this->reportAlreadySent($report, $period)) {
             $logger->warning(
-                'Preventing the same scheduled report from being sent again (report #%s for period "%s")',
-                $report['idreport'],
-                $prettyDate
+                sprintf(
+                    'Preventing the same scheduled report from being sent again (report #%s for period "%s")',
+                    $report['idreport'],
+                    $prettyDate
+                )
             );
             return;
         }