docs: add missing --format description in pnpm outdated --help command (#8626)

.changeset/soft-sheep-tickle.md

@@ -0,0 +1,5 @@
+---
+"@pnpm/plugin-commands-outdated": patch
+---
+
+Add missing `--format` description in `pnpm outdated --help` command

reviewing/plugin-commands-outdated/src/outdated.ts

@@ -107,6 +107,10 @@ For options that may be used with `-r`, see "pnpm help recursive"',
             description: 'Don\'t check "optionalDependencies"',
             name: '--no-optional',
           },
+          {
+            description: 'Prints the outdated dependencies in the given format. Default is "table". Supported options: "table, list, json"',
+            name: '--format <format>',
+          },
           {
             description: 'Specify the sorting method. Currently only `name` is supported.',
             name: '--sort-by',