Update dependency openapi-typescript to v7.12.0 (#429)

Author: renovate[bot]

package.json

@@ -29,7 +29,7 @@
     "@biomejs/biome": "2.3.14",
     "@sindresorhus/tsconfig": "8.1.0",
     "ava": "6.4.1",
-    "openapi-typescript": "7.10.1",
+    "openapi-typescript": "7.12.0",
     "typescript": "5.9.3"
   },
   "engines": {