docs: clarify that the team packages permission covers all org packages (#39953) (#39956)

The Packages row in the team settings read "Manage repository
packages.", but packages belong to the owner, so a team's Packages
permission applies to every package of the organization, regardless of
the team's repositories. Reword it to say so. The docs get the same
clarification in https://gitea.com/gitea/docs/pulls/605.

Co-authored-by: silverwind <me@silverwind.io>

options/locale/locale_en-US.json

@@ -3556,7 +3556,7 @@
   "units.error.no_unit_allowed_repo": "You are not allowed to access any section of this repository.",
   "units.error.unit_not_allowed": "You are not allowed to access this repository section.",
   "packages.title": "Packages",
-  "packages.desc": "Manage repository packages.",
+  "packages.desc": "Access all packages of the organization, regardless of the team's repositories.",
   "packages.empty": "There are no packages yet.",
   "packages.no_metadata": "No metadata.",
   "packages.empty.documentation": "For more information on the package registry, see <a target=\"_blank\" rel=\"noopener noreferrer\" href=\"%s\">the documentation</a>.",