composer(deps-dev): bump infection/infection from 0.26.3 to 0.26.4

Bumps [infection/infection](https://github.com/infection/infection) from 0.26.3 to 0.26.4.
- [Release notes](https://github.com/infection/infection/releases)
- [Changelog](https://github.com/infection/infection/blob/master/CHANGELOG.md)
- [Commits](infection/infection@0.26.3...0.26.4)

---
updated-dependencies:
- dependency-name: infection/infection
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

composer.json

@@ -36,7 +36,7 @@
     "ergebnis/license": "^1.2.0",
     "ergebnis/php-cs-fixer-config": "^3.4.0",
     "ergebnis/phpstan-rules": "^1.0.0",
-    "infection/infection": "~0.26.3",
+    "infection/infection": "~0.26.4",
     "phpstan/extension-installer": "^1.1.0",
     "phpstan/phpstan": "^1.4.2",
     "phpstan/phpstan-deprecation-rules": "^1.0.0",