[TASK] Update PHPStan to 1.6.3

The new version finds some new possible bugs.

Used commands:

> composer require --dev phpstan/phpstan:^1.6.3
> Build/Scripts/runTests.sh -s phpstanGenerateBaseline

Resolves: #97508
Releases: main, 11.5
Change-Id: I7a813c4f12258aad96b99cec3feb93ee10d55bcf
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/74481
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Reviewed-by: Elias Häußler <e.haeussler@familie-redlich.de>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Oliver Klee <typo3-coding@oliverklee.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Stefan Bürk <stefan@buerk.tech>

Build/phpstan/phpstan-baseline.neon

@@ -4220,6 +4220,11 @@ parameters:
 			count: 2
 			path: ../../typo3/sysext/frontend/Tests/Unit/Authentication/FrontendUserAuthenticationTest.php
 
+		-
+			message: "#^Call to static method PHPUnit\\\\Framework\\\\Assert\\:\\:assertFalse\\(\\) with string will always evaluate to false\\.$#"
+			count: 1
+			path: ../../typo3/sysext/frontend/Tests/Unit/ContentObject/ContentObjectRendererTest.php
+
 		-
 			message: "#^Call to static method PHPUnit\\\\Framework\\\\Assert\\:\\:assertSame\\(\\) with 5 and string will always evaluate to false\\.$#"
 			count: 1

composer.json

@@ -111,7 +111,7 @@
 		"php-webdriver/webdriver": "^1.12.0",
 		"phpspec/prophecy": "^1.15.0",
 		"phpspec/prophecy-phpunit": "^2.0.1",
-		"phpstan/phpstan": "^1.6.0",
+		"phpstan/phpstan": "^1.6.3",
 		"phpstan/phpstan-phpunit": "^1.1.1",
 		"phpunit/phpunit": "^9.5.20",
 		"typo3/cms-styleguide": "~12.0@dev",