fix: correct typos in code comments

[viktorking7]

This PR fixes minor spelling errors in code comments across multiple files.

- **accounts-controller**: Fixed "instanciation" → "instantiation" in typing.ts
- **permission-controller**: Fixed "artifically" → "artificially" in ARCHITECTURE.md  
- **permission-controller**: Fixed "specificed" → "specified" in PermissionController.ts

---

Note

Fixes minor spelling mistakes in comments and documentation across accounts- and permission-controller; no functional changes.

• accounts-controller:
  • packages/accounts-controller/src/typing.ts: Correct "instanciation" → "instantiation" in comment.
• permission-controller:
  • packages/permission-controller/ARCHITECTURE.md: Correct "artifically" → "artificially" in example comment.
  • packages/permission-controller/src/PermissionController.ts: Correct "specificed" → "specified" in GrantPermissions and GrantPermissionsIncremental comments.

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