CI: Cancel previous workflow runs on PRs #2090

Job	Run time
check-bridgejs-generated	2m 50s
Test BridgeJS against Swift versions (swift:6.2, 602.0.0)	3m 6s
Test BridgeJS against Swift versions (swift:6.1.2, 601.0.0)	2m 52s
Build for native target (macos-15, Xcode_16.4)	3m 36s
build-examples	17m 43s
Build and Test (ubuntu-24.04, https://download.swift.org/development/ubuntu2404/swift-DEVELOPMENT...	54s
Build and Test (ubuntu-22.04, https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT...	53s
Build and Test (ubuntu-24.04, https://download.swift.org/swift-6.3-branch/ubuntu2404/swift-6.3-DE...	55s
Build and Test (ubuntu-22.04, https://download.swift.org/swift-6.1-release/ubuntu2204/swift-6.1-R...	57s
format	32s
deploy-examples	9s
	34m 27s

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