fix: correct PHPStan TYPO3 extension package name

Build/phpstan.neon referenced wrong package name causing CI failure:
- saschaegerer/phpstan-typo3 (incorrect, doesn't exist in vendor)
- friendsoftypo3/phpstan-typo3 (correct, as per composer.json)

The package was renamed from saschaegerer to friendsoftypo3 organization.
This fix aligns Build/phpstan.neon with the actual installed package.

Resolves "File is missing or is not readable" error for extension.neon.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: CybotTM

Build/phpstan.neon

@@ -2,7 +2,7 @@ includes:
     - %currentWorkingDirectory%/.Build/vendor/phpstan/phpstan-strict-rules/rules.neon
     - %currentWorkingDirectory%/.Build/vendor/phpstan/phpstan-deprecation-rules/rules.neon
 #    - %currentWorkingDirectory%/.Build/vendor/phpstan/phpstan-phpunit/rules.neon
-    - %currentWorkingDirectory%/.Build/vendor/saschaegerer/phpstan-typo3/extension.neon
+    - %currentWorkingDirectory%/.Build/vendor/friendsoftypo3/phpstan-typo3/extension.neon
     - %currentWorkingDirectory%/Build/phpstan-baseline.neon
 
 parameters: