Swift: Add change note

Author: jketema

swift/ql/lib/change-notes/2025-10-31-swift-6.2-ast.md

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+---
+category: feature
+---
+* Added AST nodes `UsingDecl`, `UnsafeExpr`, and `InlineArrayType` that correspond to new nodes in Swift 6.2.
+* Added new predicates `isDistributedGet`, `isRead2`, `isModify2`, and `isInit` to the `Accessor` class that correspond to new accessors in Swift 6.2.
+* Added a new predicate `isApply` to the `KeyPathComponent` class that corresponds to method and initializer key path components in Swift 6.2.