fix: add global option in pnpm link --help (#5461)

Co-authored-by: Zoltan Kochan <z@kochan.io>

.changeset/famous-rocks-yawn.md

@@ -0,0 +1,6 @@
+---
+"@pnpm/plugin-commands-installation": patch
+"pnpm": patch
+---
+
+Add global option in `pnpm link --help` [#5461](https://github.com/pnpm/pnpm/pull/5461).

packages/plugin-commands-installation/src/link.ts

@@ -64,14 +64,19 @@ export function help () {
 
         list: [
           ...UNIVERSAL_OPTIONS,
+          {
+            description: 'Link package to/from global node_modules',
+            name: '--global',
+            shortAlias: '-g',
+          },
         ],
       },
     ],
     url: docsUrl('link'),
     usages: [
-      'pnpm link (in package dir)',
-      'pnpm link <pkg>',
       'pnpm link <dir>',
+      'pnpm link --global (in package dir)',
+      'pnpm link --global <pkg>',
     ],
   })
 }