[BUGFIX] Correctly display the CGI environment in Environment module

During the TYPO3 v9 install tool refactoring, a simple PHP array syntax
mistake did not correctly set the fluid variable "systemInformationCgiDetected"
which always resulted in not running in a CGI environment.

The change adapts the array variable assignment.

Resolves: #87320
Releases: master, 9.5
Change-Id: I2368ff033a6318d67c9153be20816d13ad8bd08d
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/62802
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Benni Mack <benni@typo3.org>

typo3/sysext/install/Classes/Controller/EnvironmentController.php

@@ -68,7 +68,7 @@ public function systemInformationGetDataAction(ServerRequestInterface $request):
     {
         $view = $this->initializeStandaloneView($request, 'Environment/SystemInformation.html');
         $view->assignMultiple([
-            'systemInformationCgiDetected', GeneralUtility::isRunningOnCgiServerApi(),
+            'systemInformationCgiDetected' => GeneralUtility::isRunningOnCgiServerApi(),
             'systemInformationDatabaseConnections' => $this->getDatabaseConnectionInformation(),
             'systemInformationOperatingSystem' => Environment::isWindows() ? 'Windows' : 'Unix',
         ]);