[typo] Changing date from `2023` to `2024` in mkdocs site (#3176)

Signed-off-by: Bradley <41597815+userbradley@users.noreply.github.com>

hack/api-docs/mkdocs.yml

@@ -25,8 +25,8 @@ plugins:
   - macros:
       include_dir: docs/snippets
 copyright: |
-  &copy; 2023 The external-secrets Authors.<br/>
-  &copy; 2023 The Linux Foundation. All rights reserved.<br/><br/>
+  &copy; 2024 The external-secrets Authors.<br/>
+  &copy; 2024 The Linux Foundation. All rights reserved.<br/><br/>
   The Linux Foundation has registered trademarks and uses trademarks.<br/>
   For a list of trademarks of The Linux Foundation, please see our <a href="https://www.linuxfoundation.org/trademark-usage/">Trademark Usage page</a>.
 extra: