fix: upgrade @hey-api/openapi-ts from 0.64.8 to 0.64.15

Snyk has created this PR to upgrade @hey-api/openapi-ts from 0.64.8 to 0.64.15.

See this package in npm:
@hey-api/openapi-ts

See this project in Snyk:
https://app.snyk.io/org/jcdcdev/project/3d9804d5-b21c-49c2-9d46-c76f52c51ac0?utm_source=github&utm_medium=referral&page=upgrade-pr

Author: snyk-bot

src/jcdcdev.Umbraco.ReadingTime.Client/package-lock.json

@@ -13,7 +13,7 @@
 		"lit": "^3.2.1"
 	},
 	"devDependencies": {
-		"@hey-api/openapi-ts": "^0.64.8",
+		"@hey-api/openapi-ts": "^0.64.15",
 		"@umbraco-cms/backoffice": "^15.2.2",
 		"typescript": "^5.8.2",
 		"vite": "^5.4.18"