Update dependency composer/composer to ^2.7.6

| datasource | package           | from  | to    |
| ---------- | ----------------- | ----- | ----- |
| packagist  | composer/composer | 2.7.5 | 2.7.6 |

Author: renovate[bot]

composer.json

@@ -14,7 +14,7 @@
         "composer-runtime-api": "^2.2.0"
     },
     "require-dev": {
-        "composer/composer":                      "^2.7.5",
+        "composer/composer":                      "^2.7.6",
         "doctrine/coding-standard":               "^12.0.0",
         "ext-zip":                                "^1.15.0",
         "roave/infection-static-analysis-plugin": "^1.35.0",