Fix: double semicolon typo in AuthorizationCodeGrant.ts

## Description

There's a minor typo in `src/core/AuthorizationCodeGrant.ts` at line 128 - a double semicolon `;;` instead of a single one.

```typescript
return { clientDetails: client_details } as SessionInformation;;
```

Should be:

```typescript
return { clientDetails: client_details } as SessionInformation;
```

## Impact

No functional impact - just a cosmetic fix for code cleanliness.