Fix missing comma in @_expose attribute for SwiftSyntax602 #2034

Job	Run time
format	33s
Build for native target (macos-15, Xcode_16.4)	3m 42s
Test BridgeJS against Swift versions (swift:6.0.3)	2m 28s
Build and Test (ubuntu-22.04, https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT...	17m 21s
Build and Test (ubuntu-22.04, https://download.swift.org/swift-6.1-release/ubuntu2204/swift-6.1-R...	13m 45s
Test BridgeJS against Swift versions (swift:6.2)	2m 33s
Build and Test (ubuntu-24.04, https://download.swift.org/development/ubuntu2404/swift-DEVELOPMENT...	13m 39s
Build and Test (ubuntu-24.04, https://download.swift.org/swift-6.3-branch/ubuntu2404/swift-6.3-DE...	13m 31s
Test BridgeJS against Swift versions (swift:6.1.2)	2m 32s
build-examples	44m 29s
check-bridgejs-generated	2m 47s
deploy-examples	0s
	1h 57m 20s

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