fix(deps): update dependency @auth/sveltekit to ^0.15.0

Author: renovate[bot]

package-lock.json

@@ -13,7 +13,7 @@
 	},
 	"dependencies": {
 		"@auth/core": "^0.18.1",
-		"@auth/sveltekit": "^0.3.12",
+		"@auth/sveltekit": "^0.15.0",
 		"@fontsource/inter": "^5.0.15",
 		"@fontsource/jetbrains-mono": "^5.0.17",
 		"@vercel/kv": "^1.0.0",