Bug Description

The no_extension_access_modifier rule triggers for a nonisolated extension, which is incorrect since the nonisolated here isn't an access control modifier.
(The ability to use the nonisolated keyword on extensions was added with Swift 6.1.)

@MainActor
struct Test {}

nonisolated extension Test {} // No Extension Access Modifier Violation: Prefer not to use extension access modifiers (no_extension_access_modifier)

Environment

• SwiftLint version: 0.59.1
• Xcode version: Xcode 16.4 (16F6)
• Installation method used: built from source
• Configuration file:

  enabled_rules:
    - no_extension_access_modifier

• no nested configurations