ci: bump dayjs from 1.11.20 to 1.11.21 (#1139)

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

package-lock.json

@@ -49,7 +49,7 @@
     "bufferutil": "^4.1.0",
     "colors": "1.4.0",
     "cron": "^4.4.0",
-    "dayjs": "^1.11.20",
+    "dayjs": "^1.11.21",
     "decache": "^4.6.2",
     "discord.js": "^13.17.1",
     "flat-cache": "^3.2.0",