Change "My collections" path to /@username/collections (#38630)

app/javascript/mastodon/locales/en.json

@@ -417,7 +417,6 @@
   "column.about": "About",
   "column.blocks": "Blocked users",
   "column.bookmarks": "Bookmarks",
-  "column.collections": "My collections",
   "column.community": "Local timeline",
   "column.create_list": "Create list",
   "column.direct": "Private mentions",
@@ -433,7 +432,9 @@
   "column.list_members": "Manage list members",
   "column.lists": "Lists",
   "column.mutes": "Muted users",
+  "column.my_collections": "My collections",
   "column.notifications": "Notifications",
+  "column.other_collections": "Collections by {name}",
   "column.pins": "Pinned posts",
   "column.public": "Federated timeline",
   "column_back_button.label": "Back",