build(deps): bump symfony/polyfill-mbstring from 1.37.0 to 1.38.1

Bumps [symfony/polyfill-mbstring](https://github.com/symfony/polyfill-mbstring) from 1.37.0 to 1.38.1.
- [Release notes](https://github.com/symfony/polyfill-mbstring/releases)
- [Commits](https://github.com/symfony/polyfill-mbstring/compare/v1.37.0...v1.38.1)

---
updated-dependencies:
- dependency-name: symfony/polyfill-mbstring
  dependency-version: 1.38.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

composer.lock

@@ -1208,16 +1208,16 @@
         },
         {
             "name": "symfony/polyfill-mbstring",
-            "version": "v1.37.0",
+            "version": "v1.38.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/polyfill-mbstring.git",
-                "reference": "6a21eb99c6973357967f6ce3708cd55a6bec6315"
+                "reference": "14c5439eec4ccff081ac14eca2dc57feb2a66d92"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/polyfill-mbstring/zipball/6a21eb99c6973357967f6ce3708cd55a6bec6315",
-                "reference": "6a21eb99c6973357967f6ce3708cd55a6bec6315",
+                "url": "https://api.github.com/repos/symfony/polyfill-mbstring/zipball/14c5439eec4ccff081ac14eca2dc57feb2a66d92",
+                "reference": "14c5439eec4ccff081ac14eca2dc57feb2a66d92",
                 "shasum": ""
             },
             "require": {
@@ -1269,7 +1269,7 @@
                 "shim"
             ],
             "support": {
-                "source": "https://github.com/symfony/polyfill-mbstring/tree/v1.37.0"
+                "source": "https://github.com/symfony/polyfill-mbstring/tree/v1.38.1"
             },
             "funding": [
                 {
@@ -1289,7 +1289,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2026-04-10T17:25:58+00:00"
+            "time": "2026-05-26T12:51:13+00:00"
         },
         {
             "name": "symfony/polyfill-php81",