chore(deps): update Next.js to 15.5.21 (#206)

Author: saagpatel

web/package.json

@@ -10,7 +10,7 @@
 		"typecheck": "tsc --noEmit"
 	},
 	"dependencies": {
-		"next": "^15.5.0",
+		"next": "^15.5.21",
 		"react": "^19.1.0",
 		"react-dom": "^19.1.0"
 	},