Update dependency openapi-typescript to v6.7.6 (#278)

Author: renovate[bot]

package.json

@@ -40,7 +40,7 @@
     "eslint-plugin-import": "2.29.1",
     "eslint-plugin-simple-import-sort": "12.1.0",
     "eslint-plugin-unicorn": "53.0.0",
-    "openapi-typescript": "6.7.5",
+    "openapi-typescript": "6.7.6",
     "prettier": "3.2.5",
     "typescript": "5.4.5"
   },