chore(deps): update devdependency knip to v6

Author: renovate[bot]

package.json

@@ -129,7 +129,7 @@
 		"discord-api-types": "^0.38.42",
 		"eslint": "^9.39.4",
 		"eslint-plugin-regexp": "^3.0.0",
-		"knip": "^5.86.0",
+		"knip": "^6.0.0",
 		"prisma": "^7.7.0",
 		"prisma-json-types-generator": "^4.1.1",
 		"skilld": "^1.6.2",