[PHP]: Update vimeo/psalm requirement in /vendor-bin/phpunit

Updates the requirements on [vimeo/psalm](https://github.com/vimeo/psalm) to permit the latest version.
- [Release notes](https://github.com/vimeo/psalm/releases)
- [Commits](vimeo/psalm@5.25.0...5.26.0)

---
updated-dependencies:
- dependency-name: vimeo/psalm
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>

vendor-bin/phpunit/composer.json

@@ -1,7 +1,7 @@
 {
     "require-dev": {
         "symfony/phpunit-bridge": "7.1.4",
-        "vimeo/psalm": "5.25.0",
+        "vimeo/psalm": "5.26.0",
         "psalm/plugin-phpunit": "0.19.0",
         "weirdan/doctrine-psalm-plugin": "2.9.0",
         "phpunit/phpunit": "9.6.20"