Fix typo in TypeScript roadmap (#7854)

* Fix typo roadmap/typescript/namespace-a[gu -> ug]mentation

tldr: fix typo: namespace-agumentation....md -> namespace-augmentation....md

Long Version:
Rename namespace-agumentation@16TT8R4N-9tCfWmPetqMP.md to namespace-augmentation@16TT8R4N-9tCfWmPetqMP.md

Fixes english typo in topic name.

* typescript.json: label change for namespace-augmentation typofix

changed "label": "Namespace A[gu -> ug]mentation"

src/data/roadmaps/typescript/typescript.json

@@ -3358,7 +3358,7 @@
       },
       "selected": false,
       "data": {
-        "label": "Namespace Agumentation",
+        "label": "Namespace Augmentation",
         "style": {
           "fontSize": 17,
           "justifyContent": "flex-start",