[composer] Bump yahnis-elsts/plugin-update-checker

Bumps the composer-dependencies group with 1 update in the / directory: [yahnis-elsts/plugin-update-checker](https://github.com/YahnisElsts/plugin-update-checker).


Updates `yahnis-elsts/plugin-update-checker` from 5.6 to 5.7
- [Release notes](https://github.com/YahnisElsts/plugin-update-checker/releases)
- [Commits](YahnisElsts/plugin-update-checker@v5.6...v5.7)

---
updated-dependencies:
- dependency-name: yahnis-elsts/plugin-update-checker
  dependency-version: '5.7'
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: composer-dependencies
...

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

Author: dependabot[bot]

composer.json

@@ -10,7 +10,7 @@
         }
     ],
     "require": {
-        "yahnis-elsts/plugin-update-checker": "^5.6"
+        "yahnis-elsts/plugin-update-checker": "^5.7"
     },
     "require-dev": {
         "roave/security-advisories": "dev-latest",