chore(deps): bump monolog/monolog in /tests/apps/php

Bumps [monolog/monolog](https://github.com/Seldaek/monolog) from 3.12.0 to 3.12.1.
- [Release notes](https://github.com/Seldaek/monolog/releases)
- [Changelog](https://github.com/Seldaek/monolog/blob/main/CHANGELOG.md)
- [Commits](https://github.com/Seldaek/monolog/compare/3.12.0...3.12.1)

---
updated-dependencies:
- dependency-name: monolog/monolog
  dependency-version: 3.12.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

tests/apps/php/composer.lock

@@ -8,16 +8,16 @@
     "packages": [
         {
             "name": "monolog/monolog",
-            "version": "3.12.0",
+            "version": "3.12.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/Seldaek/monolog.git",
-                "reference": "72c534fc0ab181ef52d92a68382318631e301608"
+                "reference": "d7059e4c691d05ea1222b5124bed0f961be46e15"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/Seldaek/monolog/zipball/72c534fc0ab181ef52d92a68382318631e301608",
-                "reference": "72c534fc0ab181ef52d92a68382318631e301608",
+                "url": "https://api.github.com/repos/Seldaek/monolog/zipball/d7059e4c691d05ea1222b5124bed0f961be46e15",
+                "reference": "d7059e4c691d05ea1222b5124bed0f961be46e15",
                 "shasum": ""
             },
             "require": {
@@ -97,7 +97,7 @@
             ],
             "support": {
                 "issues": "https://github.com/Seldaek/monolog/issues",
-                "source": "https://github.com/Seldaek/monolog/tree/3.12.0"
+                "source": "https://github.com/Seldaek/monolog/tree/3.12.1"
             },
             "funding": [
                 {
@@ -109,7 +109,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2026-09-09T08:34:20+00:00"
+            "time": "2026-09-29T19:21:12+00:00"
         },
         {
             "name": "nikic/fast-route",