fix: execute aliased tsc6 binary in typecheck script

package.json

@@ -11,7 +11,7 @@
 		"build": "next build",
 		"start": "next start",
 		"prisma:generate": "prisma generate",
-		"typecheck": "pnpm exec tsc --noEmit --incremental false",
+		"typecheck": "tsc6 --noEmit --incremental false",
 		"biome:check": "biome check --write .",
 		"biome:lint": "biome lint .",
 		"biome:format": "biome format --write .",