Bump openmetrics-php/exposition-text from 0.3.1 to 0.4.0

Bumps [openmetrics-php/exposition-text](https://github.com/openmetrics-php/exposition-text) from 0.3.1 to 0.4.0.
- [Release notes](https://github.com/openmetrics-php/exposition-text/releases)
- [Changelog](https://github.com/openmetrics-php/exposition-text/blob/master/CHANGELOG.md)
- [Commits](openmetrics-php/exposition-text@v0.3.1...v0.4.0)

---
updated-dependencies:
- dependency-name: openmetrics-php/exposition-text
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

composer.json

@@ -12,7 +12,7 @@
     "require": {
         "php": ">=8.0",
         "stevenmaguire/trello-php": "^1.0.0",
-        "openmetrics-php/exposition-text": "^0.3.1"
+        "openmetrics-php/exposition-text": "^0.4.0"
     }
     ,
     "require-dev": {