tools(deps): bump infection/infection in /.tools/infection

Bumps [infection/infection](https://github.com/infection/infection) from 0.25.5 to 0.25.6.
- [Release notes](https://github.com/infection/infection/releases)
- [Changelog](https://github.com/infection/infection/blob/master/CHANGELOG.md)
- [Commits](infection/infection@0.25.5...0.25.6)

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

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

.tools/infection/composer.json

@@ -1,7 +1,7 @@
 {
   "require": {
     "php": "^7.4.7 || ^8.0.0",
-    "infection/infection": "0.25.5"
+    "infection/infection": "0.25.6"
   },
   "config": {
     "allow-plugins": {