Bump php-http/discovery from 1.15.2 to 1.15.3

Bumps [php-http/discovery](https://github.com/php-http/discovery) from 1.15.2 to 1.15.3.
- [Release notes](https://github.com/php-http/discovery/releases)
- [Changelog](https://github.com/php-http/discovery/blob/1.x/CHANGELOG.md)
- [Commits](https://github.com/php-http/discovery/compare/1.15.2...1.15.3)

---
updated-dependencies:
- dependency-name: php-http/discovery
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

composer.lock

@@ -6786,16 +6786,16 @@
         },
         {
             "name": "php-http/discovery",
-            "version": "1.15.2",
+            "version": "1.15.3",
             "source": {
                 "type": "git",
                 "url": "https://github.com/php-http/discovery.git",
-                "reference": "5cc428320191ac1d0b6520034c2dc0698628ced5"
+                "reference": "3ccd28dd9fb34b52db946abea1b538568e34eae8"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/php-http/discovery/zipball/5cc428320191ac1d0b6520034c2dc0698628ced5",
-                "reference": "5cc428320191ac1d0b6520034c2dc0698628ced5",
+                "url": "https://api.github.com/repos/php-http/discovery/zipball/3ccd28dd9fb34b52db946abea1b538568e34eae8",
+                "reference": "3ccd28dd9fb34b52db946abea1b538568e34eae8",
                 "shasum": ""
             },
             "require": {
@@ -6854,9 +6854,9 @@
             ],
             "support": {
                 "issues": "https://github.com/php-http/discovery/issues",
-                "source": "https://github.com/php-http/discovery/tree/1.15.2"
+                "source": "https://github.com/php-http/discovery/tree/1.15.3"
             },
-            "time": "2023-02-11T08:28:41+00:00"
+            "time": "2023-03-31T14:40:37+00:00"
         },
         {
             "name": "php-http/guzzle5-adapter",