chore: update copyright to 2024

Signed-off-by: peefy <xpf6677@163.com>

Author: Peefy

i18n/en/docusaurus-theme-classic/footer.json

@@ -60,7 +60,7 @@
     "description": "The label of footer link with label=KusionStack linking to https://kusionstack.io"
   },
   "copyright": {
-    "message": "\n          <br />\n          <br />\n          <strong>© KCL Authors 2023 | Documentation Distributed under <a href=\"https://creativecommons.org/licenses/by/4.0\">CC-BY-4.0</a> </strong> \n          <br />\n          <br />\n          © 2023 The Linux Foundation. All rights reserved. The Linux Foundation has registered trademarks and uses trademarks. For a list of trademarks of The Linux Foundation, please see our <a href=\"https://www.linuxfoundation.org/trademark-usage/\"> Trademark Usage</a> page.\n        ",
+    "message": "\n          <br />\n          <br />\n          <strong>© KCL Authors 2024 | Documentation Distributed under <a href=\"https://creativecommons.org/licenses/by/4.0\">CC-BY-4.0</a> </strong> \n          <br />\n          <br />\n          © 2024 The Linux Foundation. All rights reserved. The Linux Foundation has registered trademarks and uses trademarks. For a list of trademarks of The Linux Foundation, please see our <a href=\"https://www.linuxfoundation.org/trademark-usage/\"> Trademark Usage</a> page.\n        ",
     "description": "The footer copyright"
   }
 }