Chore(deps-dev): Bump phpunit/phpunit from 9.6.8 to 9.6.9

Bumps [phpunit/phpunit](https://github.com/sebastianbergmann/phpunit) from 9.6.8 to 9.6.9.
- [Changelog](https://github.com/sebastianbergmann/phpunit/blob/9.6.9/ChangeLog-9.6.md)
- [Commits](https://github.com/sebastianbergmann/phpunit/compare/9.6.8...9.6.9)

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

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

composer.lock

@@ -1835,16 +1835,16 @@
         },
         {
             "name": "phpunit/phpunit",
-            "version": "9.6.8",
+            "version": "9.6.9",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/phpunit.git",
-                "reference": "17d621b3aff84d0c8b62539e269e87d8d5baa76e"
+                "reference": "a9aceaf20a682aeacf28d582654a1670d8826778"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/17d621b3aff84d0c8b62539e269e87d8d5baa76e",
-                "reference": "17d621b3aff84d0c8b62539e269e87d8d5baa76e",
+                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/a9aceaf20a682aeacf28d582654a1670d8826778",
+                "reference": "a9aceaf20a682aeacf28d582654a1670d8826778",
                 "shasum": ""
             },
             "require": {
@@ -1918,7 +1918,7 @@
             "support": {
                 "issues": "https://github.com/sebastianbergmann/phpunit/issues",
                 "security": "https://github.com/sebastianbergmann/phpunit/security/policy",
-                "source": "https://github.com/sebastianbergmann/phpunit/tree/9.6.8"
+                "source": "https://github.com/sebastianbergmann/phpunit/tree/9.6.9"
             },
             "funding": [
                 {
@@ -1934,7 +1934,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2023-05-11T05:14:45+00:00"
+            "time": "2023-06-11T06:13:56+00:00"
         },
         {
             "name": "psr/clock",