Bump actions/checkout from 6 to 7 (#770) #2738

Job	Run time
build-examples	58m 2s
prettier	11s
check-bridgejs-generated	3m 13s
Build and Test (ubuntu-22.04, https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT...	19m 12s
Build and Test (ubuntu-24.04, https://download.swift.org/development/ubuntu2404/swift-DEVELOPMENT...	14m 30s
Build for native target (macos-15, Xcode_26.0.1)	3m 36s
Build and Test (ubuntu-24.04, https://download.swift.org/swift-6.3-branch/ubuntu2404/swift-6.3-DE...	13m 34s
Test BridgeJS against Swift versions (swift:6.3, 603.0.0)	3m 22s
format	35s
deploy-examples	47s
	1h 57m 2s

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