fix link to package registry docs (#19268)

Author: noerw

options/locale/locale_en-US.ini

@@ -3005,7 +3005,7 @@ error.unit_not_allowed = You are not allowed to access this repository section.
 title = Packages
 desc = Manage repository packages.
 empty = There are no packages yet.
-empty.documentation = For more information on the package registry, see <a target="_blank" rel="noopener noreferrer" href="https://docs.gitea.io/en-us/overview">the documentation</a>.
+empty.documentation = For more information on the package registry, see <a target="_blank" rel="noopener noreferrer" href="https://docs.gitea.io/en-us/packages/overview">the documentation</a>.
 filter.type = Type
 filter.type.all = All
 filter.no_result = Your filter produced no results.
@@ -3088,4 +3088,4 @@ settings.delete = Delete package
 settings.delete.description = Deleting a package is permanent and cannot be undone.
 settings.delete.notice = You are about to delete %s (%s). This operation is irreversible, are you sure?
 settings.delete.success = The package has been deleted.
-settings.delete.error = Failed to delete the package.
+settings.delete.error = Failed to delete the package.